40692421 has 24 divisors (see below), whose sum is σ = 51710400. Its totient is φ = 31342080.

The previous prime is 40692419. The next prime is 40692427. The reversal of 40692421 is 12429604.

It is not a de Polignac number, because 40692421 - 2¹ = 40692419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40692421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40692427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90405 + ... + 90853.

It is an arithmetic number, because the mean of its divisors is an integer number (2154600).

Almost surely, 2^40692421 is an apocalyptic number.

It is an amenable number.

40692421 is a deficient number, since it is larger than the sum of its proper divisors (11017979).

40692421 is a wasteful number, since it uses less digits than its factorization.

40692421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40692421 is about 6379.0611378164. The cubic root of 40692421 is about 343.9572829822.

The spelling of 40692421 in words is "forty million, six hundred ninety-two thousand, four hundred twenty-one".