40420425 has 12 divisors (see below), whose sum is σ = 66828560. Its totient is φ = 21557520.

The previous prime is 40420411. The next prime is 40420433. The reversal of 40420425 is 52402404.

It is not a de Polignac number, because 40420425 - 2⁷ = 40420297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269395 + ... + 269544.

Almost surely, 2^40420425 is an apocalyptic number.

It is an amenable number.

40420425 is a deficient number, since it is larger than the sum of its proper divisors (26408135).

40420425 is a wasteful number, since it uses less digits than its factorization.

40420425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538952 (or 538947 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40420425 is about 6357.7059541945. The cubic root of 40420425 is about 343.1892101492.

Adding to 40420425 its reverse (52402404), we get a palindrome (92822829).

The spelling of 40420425 in words is "forty million, four hundred twenty thousand, four hundred twenty-five".