42566404 has 12 divisors (see below), whose sum is σ = 74557504. Its totient is φ = 21264264.

The previous prime is 42566401. The next prime is 42566411. The reversal of 42566404 is 40466524.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42566401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129 + ... + 9295.

Almost surely, 2^42566404 is an apocalyptic number.

It is an amenable number.

42566404 is a deficient number, since it is larger than the sum of its proper divisors (31991100).

42566404 is a wasteful number, since it uses less digits than its factorization.

42566404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474 (or 9472 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 42566404 is about 6524.2933716993. The cubic root of 42566404 is about 349.1582602566.

It can be divided in two parts, 4 and 2566404, that multiplied together give a square (10265616 = 3204²).

The spelling of 42566404 in words is "forty-two million, five hundred sixty-six thousand, four hundred four".