156970172 has 12 divisors (see below), whose sum is σ = 289155720. Its totient is φ = 74354256.

The previous prime is 156970171. The next prime is 156970183. The reversal of 156970172 is 271079651.

156970172 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156970171) 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, 1032623 + ... + 1032774.

It is an arithmetic number, because the mean of its divisors is an integer number (24096310).

Almost surely, 2^156970172 is an apocalyptic number.

It is an amenable number.

156970172 is a deficient number, since it is larger than the sum of its proper divisors (132185548).

156970172 is a wasteful number, since it uses less digits than its factorization.

156970172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065420 (or 2065418 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 156970172 is about 12528.7737628229. The cubic root of 156970172 is about 539.4349049634.

The spelling of 156970172 in words is "one hundred fifty-six million, nine hundred seventy thousand, one hundred seventy-two".