42078625 has 16 divisors (see below), whose sum is σ = 54213120. Its totient is φ = 32574000.

The previous prime is 42078607. The next prime is 42078629. The reversal of 42078625 is 52687024.

It is not a de Polignac number, because 42078625 - 2²⁵ = 8524193 is a prime.

It is a super-2 number, since 2×42078625² = 3541221363781250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42078629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1555 + ... + 9304.

It is an arithmetic number, because the mean of its divisors is an integer number (3388320).

Almost surely, 2^42078625 is an apocalyptic number.

It is an amenable number.

42078625 is a deficient number, since it is larger than the sum of its proper divisors (12134495).

42078625 is a wasteful number, since it uses less digits than its factorization.

42078625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10905 (or 10895 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 42078625 is about 6486.8039125597. The cubic root of 42078625 is about 347.8194360991.

The spelling of 42078625 in words is "forty-two million, seventy-eight thousand, six hundred twenty-five".