401520439 has 2 divisors, whose sum is σ = 401520440. Its totient is φ = 401520438.

The previous prime is 401520437. The next prime is 401520443. The reversal of 401520439 is 934025104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401520439 - 2¹ = 401520437 is a prime.

It is a super-2 number, since 2×401520439² = 322437325869505442, which contains 22 as substring.

Together with 401520437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401520437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200760219 + 200760220.

It is an arithmetic number, because the mean of its divisors is an integer number (200760220).

Almost surely, 2^401520439 is an apocalyptic number.

401520439 is a deficient number, since it is larger than the sum of its proper divisors (1).

401520439 is an equidigital number, since it uses as much as digits as its factorization.

401520439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 401520439 is about 20037.9749226313. The cubic root of 401520439 is about 737.7386768998.

The spelling of 401520439 in words is "four hundred one million, five hundred twenty thousand, four hundred thirty-nine".