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123014321 = 313393017
BaseRepresentation
bin1110101010100…
…00110010110001
322120110202220222
413111100302301
5222442424241
620112342425
73022414223
oct725206261
9276422828
10123014321
1163490531
1235244a15
131c640c51
14124a2413
15abeda4b
hex7550cb1

123014321 has 4 divisors (see below), whose sum is σ = 123407652. Its totient is φ = 122620992.

The previous prime is 123014291. The next prime is 123014377. The reversal of 123014321 is 123410321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123410321 = 157786053.

It can be written as a sum of positive squares in 2 ways, for example, as 1221025 + 121793296 = 1105^2 + 11036^2 .

It is a cyclic number.

It is not a de Polignac number, because 123014321 - 214 = 122997937 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123014321.

It is not an unprimeable number, because it can be changed into a prime (123014921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196196 + ... + 196821.

It is an arithmetic number, because the mean of its divisors is an integer number (30851913).

Almost surely, 2123014321 is an apocalyptic number.

It is an amenable number.

123014321 is a deficient number, since it is larger than the sum of its proper divisors (393331).

123014321 is an equidigital number, since it uses as much as digits as its factorization.

123014321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393330.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123014321 is about 11091.1821281593. The cubic root of 123014321 is about 497.3382836758.

Adding to 123014321 its reverse (123410321), we get a palindrome (246424642).

It can be divided in two parts, 1230 and 14321, that added together give a palindrome (15551).

The spelling of 123014321 in words is "one hundred twenty-three million, fourteen thousand, three hundred twenty-one".

Divisors: 1 313 393017 123014321