404465161 has 4 divisors (see below), whose sum is σ = 405549892. Its totient is φ = 403380432.

The previous prime is 404465147. The next prime is 404465249. The reversal of 404465161 is 161564404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 344325136 + 60140025 = 18556^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 404465161 - 2¹⁵ = 404432393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404465261) 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, 541806 + ... + 542551.

It is an arithmetic number, because the mean of its divisors is an integer number (101387473).

Almost surely, 2^404465161 is an apocalyptic number.

It is an amenable number.

404465161 is a deficient number, since it is larger than the sum of its proper divisors (1084731).

404465161 is a wasteful number, since it uses less digits than its factorization.

404465161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084730.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 404465161 is about 20111.3192257495. The cubic root of 404465161 is about 739.5377932974.

The spelling of 404465161 in words is "four hundred four million, four hundred sixty-five thousand, one hundred sixty-one".