42156404 has 24 divisors (see below), whose sum is σ = 76876800. Its totient is φ = 20204640.

The previous prime is 42156403. The next prime is 42156409. The reversal of 42156404 is 40465124.

It is a super-2 number, since 2×42156404² = 3554324796422432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42156403) 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, 11957 + ... + 15075.

It is an arithmetic number, because the mean of its divisors is an integer number (3203200).

Almost surely, 2^42156404 is an apocalyptic number.

It is an amenable number.

42156404 is a deficient number, since it is larger than the sum of its proper divisors (34720396).

42156404 is a wasteful number, since it uses less digits than its factorization.

42156404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263 (or 3261 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42156404 is about 6492.7963159181. The cubic root of 42156404 is about 348.0336097367.

The spelling of 42156404 in words is "forty-two million, one hundred fifty-six thousand, four hundred four".