404255161 has 2 divisors, whose sum is σ = 404255162. Its totient is φ = 404255160.

The previous prime is 404255147. The next prime is 404255171. The reversal of 404255161 is 161552404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352688400 + 51566761 = 18780^2 + 7181^2 .

It is a cyclic number.

It is not a de Polignac number, because 404255161 - 2⁹ = 404254649 is a prime.

It is not a weakly prime, because it can be changed into another prime (404255101) 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 as a sum of consecutive naturals, namely, 202127580 + 202127581.

It is an arithmetic number, because the mean of its divisors is an integer number (202127581).

Almost surely, 2^404255161 is an apocalyptic number.

It is an amenable number.

404255161 is a deficient number, since it is larger than the sum of its proper divisors (1).

404255161 is an equidigital number, since it uses as much as digits as its factorization.

404255161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 404255161 is about 20106.0976074424. The cubic root of 404255161 is about 739.4097807702.

The spelling of 404255161 in words is "four hundred four million, two hundred fifty-five thousand, one hundred sixty-one".