405256867 has 2 divisors, whose sum is σ = 405256868. Its totient is φ = 405256866.

The previous prime is 405256847. The next prime is 405256913. The reversal of 405256867 is 768652504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405256867 - 2⁷ = 405256739 is a prime.

It is not a weakly prime, because it can be changed into another prime (405256847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202628433 + 202628434.

It is an arithmetic number, because the mean of its divisors is an integer number (202628434).

Almost surely, 2^405256867 is an apocalyptic number.

405256867 is a deficient number, since it is larger than the sum of its proper divisors (1).

405256867 is an equidigital number, since it uses as much as digits as its factorization.

405256867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 405256867 is about 20130.9926978279. The cubic root of 405256867 is about 740.0200061550.

The spelling of 405256867 in words is "four hundred five million, two hundred fifty-six thousand, eight hundred sixty-seven".