40491425 has 24 divisors (see below), whose sum is σ = 55829760. Its totient is φ = 28929600.

The previous prime is 40491397. The next prime is 40491443. The reversal of 40491425 is 52419404.

40491425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-40491425 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8066 + ... + 12084.

It is an arithmetic number, because the mean of its divisors is an integer number (2326240).

Almost surely, 2^40491425 is an apocalyptic number.

It is an amenable number.

40491425 is a deficient number, since it is larger than the sum of its proper divisors (15338335).

40491425 is a wasteful number, since it uses less digits than its factorization.

40491425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073 (or 4068 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 40491425 is about 6363.2872793863. The cubic root of 40491425 is about 343.3900342043.

The spelling of 40491425 in words is "forty million, four hundred ninety-one thousand, four hundred twenty-five".