405164901 has 4 divisors (see below), whose sum is σ = 540219872. Its totient is φ = 270109932.

The previous prime is 405164843. The next prime is 405164917. The reversal of 405164901 is 109461504.

It is a happy number.

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 not a de Polignac number, because 405164901 - 2²² = 400970597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405164971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67527481 + ... + 67527486.

It is an arithmetic number, because the mean of its divisors is an integer number (135054968).

Almost surely, 2^405164901 is an apocalyptic number.

It is an amenable number.

405164901 is a deficient number, since it is larger than the sum of its proper divisors (135054971).

405164901 is a wasteful number, since it uses less digits than its factorization.

405164901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135054970.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 405164901 is about 20128.7083788305. The cubic root of 405164901 is about 739.9640236953.

The spelling of 405164901 in words is "four hundred five million, one hundred sixty-four thousand, nine hundred one".