156936421 has 8 divisors (see below), whose sum is σ = 158427360. Its totient is φ = 155450928.

The previous prime is 156936419. The next prime is 156936427. The reversal of 156936421 is 124639651.

156936421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 156936421 - 2¹ = 156936419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156936427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76410 + ... + 78436.

It is an arithmetic number, because the mean of its divisors is an integer number (19803420).

Almost surely, 2^156936421 is an apocalyptic number.

It is an amenable number.

156936421 is a deficient number, since it is larger than the sum of its proper divisors (1490939).

156936421 is a wasteful number, since it uses less digits than its factorization.

156936421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its digits is 38880, while the sum is 37.

The square root of 156936421 is about 12527.4267509333. The cubic root of 156936421 is about 539.3962399264.

The spelling of 156936421 in words is "one hundred fifty-six million, nine hundred thirty-six thousand, four hundred twenty-one".