156474442 has 4 divisors (see below), whose sum is σ = 234711666. Its totient is φ = 78237220.

The previous prime is 156474419. The next prime is 156474449. The reversal of 156474442 is 244474651.

156474442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 35892081 = 10981^2 + 5991^2 .

It is a super-2 number, since 2×156474442² = 48968501998422728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156474449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39118609 + ... + 39118612.

Almost surely, 2^156474442 is an apocalyptic number.

156474442 is a deficient number, since it is larger than the sum of its proper divisors (78237224).

156474442 is an equidigital number, since it uses as much as digits as its factorization.

156474442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78237223.

The product of its digits is 107520, while the sum is 37.

The square root of 156474442 is about 12508.9744583639. The cubic root of 156474442 is about 538.8664401288.

The spelling of 156474442 in words is "one hundred fifty-six million, four hundred seventy-four thousand, four hundred forty-two".