142855251 has 16 divisors (see below), whose sum is σ = 237474048. Its totient is φ = 74210400.

The previous prime is 142855241. The next prime is 142855253. The reversal of 142855251 is 152558241.

It is not a de Polignac number, because 142855251 - 2⁹ = 142854739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (142855253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308980 + ... + 309441.

It is an arithmetic number, because the mean of its divisors is an integer number (14842128).

Almost surely, 2^142855251 is an apocalyptic number.

142855251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142855251 is a deficient number, since it is larger than the sum of its proper divisors (94618797).

142855251 is a wasteful number, since it uses less digits than its factorization.

142855251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618442.

The product of its digits is 16000, while the sum is 33.

The square root of 142855251 is about 11952.2069510195. The cubic root of 142855251 is about 522.7556509366.

The spelling of 142855251 in words is "one hundred forty-two million, eight hundred fifty-five thousand, two hundred fifty-one".