156681042 has 32 divisors (see below), whose sum is σ = 358521984. Its totient is φ = 44716800.

The previous prime is 156681023. The next prime is 156681047. The reversal of 156681042 is 240186651.

It is a junction number, because it is equal to n+sod(n) for n = 156680994 and 156681012.

It is not an unprimeable number, because it can be changed into a prime (156681047) 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 in 15 ways as a sum of consecutive naturals, for example, 55792 + ... + 58532.

It is an arithmetic number, because the mean of its divisors is an integer number (11203812).

Almost surely, 2^156681042 is an apocalyptic number.

156681042 is an abundant number, since it is smaller than the sum of its proper divisors (201840942).

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

156681042 is a wasteful number, since it uses less digits than its factorization.

156681042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 156681042 is about 12517.2298053523. The cubic root of 156681042 is about 539.1034987460.

The spelling of 156681042 in words is "one hundred fifty-six million, six hundred eighty-one thousand, forty-two".