157712420 has 12 divisors (see below), whose sum is σ = 331196124. Its totient is φ = 63084960.

The previous prime is 157712413. The next prime is 157712437. The reversal of 157712420 is 24217751.

It can be written as a sum of positive squares in 2 ways, for example, as 16957924 + 140754496 = 4118^2 + 11864^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3942791 + ... + 3942830.

It is an arithmetic number, because the mean of its divisors is an integer number (27599677).

Almost surely, 2^157712420 is an apocalyptic number.

157712420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157712420 is an abundant number, since it is smaller than the sum of its proper divisors (173483704).

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

157712420 is a wasteful number, since it uses less digits than its factorization.

157712420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885630 (or 7885628 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 157712420 is about 12558.3605617931. The cubic root of 157712420 is about 540.2838242753.

The spelling of 157712420 in words is "one hundred fifty-seven million, seven hundred twelve thousand, four hundred twenty".