42156624 has 80 divisors (see below), whose sum is σ = 112974912. Its totient is φ = 13538304.

The previous prime is 42156619. The next prime is 42156637. The reversal of 42156624 is 42665124.

It is a junction number, because it is equal to n+sod(n) for n = 42156591 and 42156600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185599 + ... + 185825.

Almost surely, 2^42156624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42156624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56487456).

42156624 is an abundant number, since it is smaller than the sum of its proper divisors (70818288).

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

42156624 is a wasteful number, since it uses less digits than its factorization.

42156624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 358 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 42156624 is about 6492.8132577489. The cubic root of 42156624 is about 348.0342151588.

The spelling of 42156624 in words is "forty-two million, one hundred fifty-six thousand, six hundred twenty-four".