406456561 has 8 divisors (see below), whose sum is σ = 470119104. Its totient is φ = 344193360.

The previous prime is 406456559. The next prime is 406456571. The reversal of 406456561 is 165654604.

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

It is not a de Polignac number, because 406456561 - 2¹ = 406456559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406456561.

It is not an unprimeable number, because it can be changed into a prime (406456571) 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, 349210 + ... + 350371.

It is an arithmetic number, because the mean of its divisors is an integer number (58764888).

Almost surely, 2^406456561 is an apocalyptic number.

It is an amenable number.

406456561 is a deficient number, since it is larger than the sum of its proper divisors (63662543).

406456561 is an equidigital number, since it uses as much as digits as its factorization.

406456561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699671.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 406456561 is about 20160.7678673209. The cubic root of 406456561 is about 740.7495211972.

The spelling of 406456561 in words is "four hundred six million, four hundred fifty-six thousand, five hundred sixty-one".