425502721 has 6 divisors (see below), whose sum is σ = 494972610. Its totient is φ = 364716576.

The previous prime is 425502719. The next prime is 425502773. The reversal of 425502721 is 127205524.

It can be written as a sum of positive squares in only one way, i.e., 307476225 + 118026496 = 17535^2 + 10864^2 .

It is not a de Polignac number, because 425502721 - 2¹ = 425502719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425502721.

It is not an unprimeable number, because it can be changed into a prime (425902721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4341816 + ... + 4341913.

It is an arithmetic number, because the mean of its divisors is an integer number (82495435).

Almost surely, 2^425502721 is an apocalyptic number.

It is an amenable number.

425502721 is a deficient number, since it is larger than the sum of its proper divisors (69469889).

425502721 is an equidigital number, since it uses as much as digits as its factorization.

425502721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8683743 (or 8683736 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 425502721 is about 20627.7172997887. The cubic root of 425502721 is about 752.1436279013.

The spelling of 425502721 in words is "four hundred twenty-five million, five hundred two thousand, seven hundred twenty-one".