156421426 has 24 divisors (see below), whose sum is σ = 274926960. Its totient is φ = 66549672.

The previous prime is 156421417. The next prime is 156421457. The reversal of 156421426 is 624124651.

It is a happy number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7881 + ... + 19363.

It is an arithmetic number, because the mean of its divisors is an integer number (11455290).

Almost surely, 2^156421426 is an apocalyptic number.

156421426 is a deficient number, since it is larger than the sum of its proper divisors (118505534).

156421426 is a wasteful number, since it uses less digits than its factorization.

156421426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11638 (or 11631 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 156421426 is about 12506.8551602711. The cubic root of 156421426 is about 538.8055744480.

The spelling of 156421426 in words is "one hundred fifty-six million, four hundred twenty-one thousand, four hundred twenty-six".