42905925 has 36 divisors (see below), whose sum is σ = 80200224. Its totient is φ = 21885600.

The previous prime is 42905917. The next prime is 42905981. The reversal of 42905925 is 52950924.

It is a happy number.

It is not a de Polignac number, because 42905925 - 2³ = 42905917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42905925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1030 + ... + 9320.

It is an arithmetic number, because the mean of its divisors is an integer number (2227784).

Almost surely, 2^42905925 is an apocalyptic number.

42905925 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42905925 is a deficient number, since it is larger than the sum of its proper divisors (37294299).

42905925 is a wasteful number, since it uses less digits than its factorization.

42905925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8330 (or 8322 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 42905925 is about 6550.2614451638. The cubic root of 42905925 is about 350.0841294361.

The spelling of 42905925 in words is "forty-two million, nine hundred five thousand, nine hundred twenty-five".