405251149 has 2 divisors, whose sum is σ = 405251150. Its totient is φ = 405251148.

The previous prime is 405251141. The next prime is 405251183. The reversal of 405251149 is 941152504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384865924 + 20385225 = 19618^2 + 4515^2 .

It is a cyclic number.

It is not a de Polignac number, because 405251149 - 2³ = 405251141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405251149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405251141) 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, 202625574 + 202625575.

It is an arithmetic number, because the mean of its divisors is an integer number (202625575).

Almost surely, 2^405251149 is an apocalyptic number.

It is an amenable number.

405251149 is a deficient number, since it is larger than the sum of its proper divisors (1).

405251149 is an equidigital number, since it uses as much as digits as its factorization.

405251149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 405251149 is about 20130.8506775049. The cubic root of 405251149 is about 740.0165256840.

The spelling of 405251149 in words is "four hundred five million, two hundred fifty-one thousand, one hundred forty-nine".