40631425 has 6 divisors (see below), whose sum is σ = 50382998. Its totient is φ = 32505120.

The previous prime is 40631417. The next prime is 40631467. The reversal of 40631425 is 52413604.

It can be written as a sum of positive squares in 3 ways, for example, as 2241009 + 38390416 = 1497^2 + 6196^2 .

It is not a de Polignac number, because 40631425 - 2³ = 40631417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1625257 = 40631425 / (4 + 0 + 6 + 3 + 1 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40631425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 812604 + ... + 812653.

Almost surely, 2^40631425 is an apocalyptic number.

It is an amenable number.

40631425 is a deficient number, since it is larger than the sum of its proper divisors (9751573).

40631425 is a wasteful number, since it uses less digits than its factorization.

40631425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625267 (or 1625262 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 40631425 is about 6374.2783905317. The cubic root of 40631425 is about 343.7853385157.

The spelling of 40631425 in words is "forty million, six hundred thirty-one thousand, four hundred twenty-five".