406502401 has 4 divisors (see below), whose sum is σ = 406658052. Its totient is φ = 406346752.

The previous prime is 406502399. The next prime is 406502423. The reversal of 406502401 is 104205604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190412401 + 216090000 = 13799^2 + 14700^2 .

It is a cyclic number.

It is not a de Polignac number, because 406502401 - 2¹ = 406502399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406502431) 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, 73840 + ... + 79153.

It is an arithmetic number, because the mean of its divisors is an integer number (101664513).

Almost surely, 2^406502401 is an apocalyptic number.

It is an amenable number.

406502401 is a deficient number, since it is larger than the sum of its proper divisors (155651).

406502401 is a wasteful number, since it uses less digits than its factorization.

406502401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155650.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 406502401 is about 20161.9046967294. The cubic root of 406502401 is about 740.7773672903. Note that the first 3 decimals are identical.

The spelling of 406502401 in words is "four hundred six million, five hundred two thousand, four hundred one".