401520289 has 2 divisors, whose sum is σ = 401520290. Its totient is φ = 401520288.

The previous prime is 401520241. The next prime is 401520359. The reversal of 401520289 is 982025104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400000000 + 1520289 = 20000^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 401520289 - 2²⁷ = 267302561 is a prime.

It is a super-2 number, since 2×401520289² = 322437084957287042, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401520289.

It is not a weakly prime, because it can be changed into another prime (401520589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200760144 + 200760145.

It is an arithmetic number, because the mean of its divisors is an integer number (200760145).

Almost surely, 2^401520289 is an apocalyptic number.

It is an amenable number.

401520289 is a deficient number, since it is larger than the sum of its proper divisors (1).

401520289 is an equidigital number, since it uses as much as digits as its factorization.

401520289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 401520289 is about 20037.9711797377. The cubic root of 401520289 is about 737.7385850317.

The spelling of 401520289 in words is "four hundred one million, five hundred twenty thousand, two hundred eighty-nine".