405565401 has 8 divisors (see below), whose sum is σ = 541311264. Its totient is φ = 270098240.

The previous prime is 405565387. The next prime is 405565403. The reversal of 405565401 is 104565504.

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

It is a cyclic number.

It is not a de Polignac number, because 405565401 - 2⁹ = 405564889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405565403) 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, 66255 + ... + 72116.

It is an arithmetic number, because the mean of its divisors is an integer number (67663908).

Almost surely, 2^405565401 is an apocalyptic number.

It is an amenable number.

405565401 is a deficient number, since it is larger than the sum of its proper divisors (135745863).

405565401 is a wasteful number, since it uses less digits than its factorization.

405565401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139351.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 405565401 is about 20138.6543989414. The cubic root of 405565401 is about 740.2077581983.

The spelling of 405565401 in words is "four hundred five million, five hundred sixty-five thousand, four hundred one".