406486521 has 96 divisors (see below), whose sum is σ = 733224960. Its totient is φ = 212015232.

The previous prime is 406486499. The next prime is 406486537. The reversal of 406486521 is 125684604.

406486521 is a `hidden beast` number, since 4 + 0 + 648 + 6 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 406486521 - 2⁵ = 406486489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406486571) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5145360 + ... + 5145438.

It is an arithmetic number, because the mean of its divisors is an integer number (7637760).

Almost surely, 2^406486521 is an apocalyptic number.

It is an amenable number.

406486521 is a deficient number, since it is larger than the sum of its proper divisors (326738439).

406486521 is a wasteful number, since it uses less digits than its factorization.

406486521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 406486521 is about 20161.5108808839. The cubic root of 406486521 is about 740.7677210186.

The spelling of 406486521 in words is "four hundred six million, four hundred eighty-six thousand, five hundred twenty-one".