405466561 has 4 divisors (see below), whose sum is σ = 406770624. Its totient is φ = 404162500.

The previous prime is 405466553. The next prime is 405466571. The reversal of 405466561 is 165664504.

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 405466561 - 2³ = 405466553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405466561.

It is not an unprimeable number, because it can be changed into a prime (405466511) 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, 651565 + ... + 652186.

It is an arithmetic number, because the mean of its divisors is an integer number (101692656).

Almost surely, 2^405466561 is an apocalyptic number.

It is an amenable number.

405466561 is a deficient number, since it is larger than the sum of its proper divisors (1304063).

405466561 is a wasteful number, since it uses less digits than its factorization.

405466561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304062.

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

The square root of 405466561 is about 20136.2002622143. The cubic root of 405466561 is about 740.1476215110.

The spelling of 405466561 in words is "four hundred five million, four hundred sixty-six thousand, five hundred sixty-one".