142157715 has 32 divisors (see below), whose sum is σ = 273630720. Its totient is φ = 61565184.

The previous prime is 142157711. The next prime is 142157731. The reversal of 142157715 is 517751241.

142157715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142157715 - 2² = 142157711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142157711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33634 + ... + 37623.

It is an arithmetic number, because the mean of its divisors is an integer number (8550960).

Almost surely, 2^142157715 is an apocalyptic number.

142157715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142157715 is a deficient number, since it is larger than the sum of its proper divisors (131473005).

142157715 is a wasteful number, since it uses less digits than its factorization.

142157715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71291.

The product of its digits is 9800, while the sum is 33.

The square root of 142157715 is about 11922.9910257452. The cubic root of 142157715 is about 521.9034223348.

The spelling of 142157715 in words is "one hundred forty-two million, one hundred fifty-seven thousand, seven hundred fifteen".