402422425 has 6 divisors (see below), whose sum is σ = 499003838. Its totient is φ = 321937920.

The previous prime is 402422417. The next prime is 402422443. The reversal of 402422425 is 524224204.

It can be written as a sum of positive squares in 3 ways, for example, as 111344704 + 291077721 = 10552^2 + 17061^2 .

It is not a de Polignac number, because 402422425 - 2³ = 402422417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 16096897 = 402422425 / (4 + 0 + 2 + 4 + 2 + 2 + 4 + 2 + 5).

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 402422425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8048424 + ... + 8048473.

Almost surely, 2^402422425 is an apocalyptic number.

It is an amenable number.

402422425 is a deficient number, since it is larger than the sum of its proper divisors (96581413).

402422425 is a wasteful number, since it uses less digits than its factorization.

402422425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16096907 (or 16096902 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 402422425 is about 20060.4692118604. The cubic root of 402422425 is about 738.2906888979.

Adding to 402422425 its reverse (524224204), we get a palindrome (926646629).

The spelling of 402422425 in words is "four hundred two million, four hundred twenty-two thousand, four hundred twenty-five".