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142312141 = 691205951
BaseRepresentation
bin10000111101110…
…00001011001101
3100220210012120001
420132320023031
5242412442031
622042124301
73345430126
oct1036701315
9326705501
10142312141
1173371244
123b7b0691
132363988a
1414c8704d
15c761861
hex87b82cd

142312141 has 4 divisors (see below), whose sum is σ = 142518784. Its totient is φ = 142105500.

The previous prime is 142312129. The next prime is 142312153. The reversal of 142312141 is 141213241.

142312141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 141213241 = 1310862557.

It is an interprime number because it is at equal distance from previous prime (142312129) and next prime (142312153).

It is a cyclic number.

It is not a de Polignac number, because 142312141 - 215 = 142279373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142312111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102285 + ... + 103666.

It is an arithmetic number, because the mean of its divisors is an integer number (35629696).

Almost surely, 2142312141 is an apocalyptic number.

It is an amenable number.

142312141 is a deficient number, since it is larger than the sum of its proper divisors (206643).

142312141 is an equidigital number, since it uses as much as digits as its factorization.

142312141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206642.

The product of its digits is 192, while the sum is 19.

The square root of 142312141 is about 11929.4652436729. The cubic root of 142312141 is about 522.0923352659.

Adding to 142312141 its reverse (141213241), we get a palindrome (283525382).

The spelling of 142312141 in words is "one hundred forty-two million, three hundred twelve thousand, one hundred forty-one".

Divisors: 1 691 205951 142312141