40642425 has 48 divisors (see below), whose sum is σ = 78616000. Its totient is φ = 20528640.

The previous prime is 40642421. The next prime is 40642447. The reversal of 40642425 is 52424604.

It is not a de Polignac number, because 40642425 - 2² = 40642421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40642421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11241 + ... + 14409.

Almost surely, 2^40642425 is an apocalyptic number.

40642425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40642425 is a deficient number, since it is larger than the sum of its proper divisors (37973575).

40642425 is a wasteful number, since it uses less digits than its factorization.

40642425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207 (or 3196 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 40642425 is about 6375.1411749074. The cubic root of 40642425 is about 343.8163596405.

The spelling of 40642425 in words is "forty million, six hundred forty-two thousand, four hundred twenty-five".