40421497 has 4 divisors (see below), whose sum is σ = 40799376. Its totient is φ = 40043620.

The previous prime is 40421483. The next prime is 40421503. The reversal of 40421497 is 79412404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40421497 - 2⁷ = 40421369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40421197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188779 + ... + 188992.

It is an arithmetic number, because the mean of its divisors is an integer number (10199844).

Almost surely, 2^40421497 is an apocalyptic number.

It is an amenable number.

40421497 is a deficient number, since it is larger than the sum of its proper divisors (377879).

40421497 is a wasteful number, since it uses less digits than its factorization.

40421497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377878.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 40421497 is about 6357.7902607746. The cubic root of 40421497 is about 343.1922440574.

The spelling of 40421497 in words is "forty million, four hundred twenty-one thousand, four hundred ninety-seven".