40807421 has 8 divisors (see below), whose sum is σ = 43870080. Its totient is φ = 37836288.

The previous prime is 40807399. The next prime is 40807433. The reversal of 40807421 is 12470804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40807421 - 2⁶ = 40807357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40807441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21956 + ... + 23741.

It is an arithmetic number, because the mean of its divisors is an integer number (5483760).

Almost surely, 2^40807421 is an apocalyptic number.

It is an amenable number.

40807421 is a deficient number, since it is larger than the sum of its proper divisors (3062659).

40807421 is a wasteful number, since it uses less digits than its factorization.

40807421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45763.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40807421 is about 6388.0686439643. The cubic root of 40807421 is about 344.2809950562.

The spelling of 40807421 in words is "forty million, eight hundred seven thousand, four hundred twenty-one".