15557142 has 32 divisors (see below), whose sum is σ = 33720192. Its totient is φ = 4765824.

The previous prime is 15557117. The next prime is 15557161. The reversal of 15557142 is 24175551.

15557142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2613 + ... + 6159.

It is an arithmetic number, because the mean of its divisors is an integer number (1053756).

Almost surely, 2^15557142 is an apocalyptic number.

15557142 is an abundant number, since it is smaller than the sum of its proper divisors (18163050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15557142 is a wasteful number, since it uses less digits than its factorization.

15557142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612.

The product of its digits is 7000, while the sum is 30.

The square root of 15557142 is about 3944.2543021464. The cubic root of 15557142 is about 249.6375654855.

The spelling of 15557142 in words is "fifteen million, five hundred fifty-seven thousand, one hundred forty-two".