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120220143 = 340073381
BaseRepresentation
bin1110010101001…
…10100111101111
322101012211000220
413022212213233
5221234021033
615532422423
72656566021
oct712464757
9271184026
10120220143
116195219a
1234317a13
131bba31a4
1411d76011
15a84abb3
hex72a69ef

120220143 has 4 divisors (see below), whose sum is σ = 160293528. Its totient is φ = 80146760.

The previous prime is 120220117. The next prime is 120220153. The reversal of 120220143 is 341022021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341022021 = 3113674007.

It is a cyclic number.

It is not a de Polignac number, because 120220143 - 28 = 120219887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120220153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20036688 + ... + 20036693.

It is an arithmetic number, because the mean of its divisors is an integer number (40073382).

Almost surely, 2120220143 is an apocalyptic number.

120220143 is a deficient number, since it is larger than the sum of its proper divisors (40073385).

120220143 is an equidigital number, since it uses as much as digits as its factorization.

120220143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40073384.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 120220143 is about 10964.4946531977. The cubic root of 120220143 is about 493.5438524566.

Adding to 120220143 its reverse (341022021), we get a palindrome (461242164).

The spelling of 120220143 in words is "one hundred twenty million, two hundred twenty thousand, one hundred forty-three".

Divisors: 1 3 40073381 120220143