156120420 has 24 divisors (see below), whose sum is σ = 437137344. Its totient is φ = 41632096.

The previous prime is 156120413. The next prime is 156120449. The reversal of 156120420 is 24021651.

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 7 ways as a sum of consecutive naturals, for example, 1300944 + ... + 1301063.

It is an arithmetic number, because the mean of its divisors is an integer number (18214056).

Almost surely, 2^156120420 is an apocalyptic number.

156120420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156120420 is an abundant number, since it is smaller than the sum of its proper divisors (281016924).

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

156120420 is a wasteful number, since it uses less digits than its factorization.

156120420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602019 (or 2602017 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 156120420 is about 12494.8157249317. The cubic root of 156120420 is about 538.4597397847.

The spelling of 156120420 in words is "one hundred fifty-six million, one hundred twenty thousand, four hundred twenty".