42156125 has 64 divisors (see below), whose sum is σ = 63258624. Its totient is φ = 27720000.

The previous prime is 42156109. The next prime is 42156131. The reversal of 42156125 is 52165124.

It is not a de Polignac number, because 42156125 - 2⁴ = 42156109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42156094 and 42156103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 980354 + ... + 980396.

It is an arithmetic number, because the mean of its divisors is an integer number (988416).

Almost surely, 2^42156125 is an apocalyptic number.

It is an amenable number.

42156125 is a deficient number, since it is larger than the sum of its proper divisors (21102499).

42156125 is a wasteful number, since it uses less digits than its factorization.

42156125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 113 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 42156125 is about 6492.7748305328. The cubic root of 42156125 is about 348.0328419483.

The spelling of 42156125 in words is "forty-two million, one hundred fifty-six thousand, one hundred twenty-five".