40457421 has 32 divisors (see below), whose sum is σ = 61776000. Its totient is φ = 26158464.

The previous prime is 40457413. The next prime is 40457477. The reversal of 40457421 is 12475404.

40457421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40457421 - 2³ = 40457413 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40457491) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 173521 + ... + 173753.

It is an arithmetic number, because the mean of its divisors is an integer number (1930500).

Almost surely, 2^40457421 is an apocalyptic number.

It is an amenable number.

40457421 is a deficient number, since it is larger than the sum of its proper divisors (21318579).

40457421 is a wasteful number, since it uses less digits than its factorization.

40457421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 40457421 is about 6360.6148287725. The cubic root of 40457421 is about 343.2938829422.

The spelling of 40457421 in words is "forty million, four hundred fifty-seven thousand, four hundred twenty-one".