402623125 has 10 divisors (see below), whose sum is σ = 503118638. Its totient is φ = 322098000.

The previous prime is 402623107. The next prime is 402623141. The reversal of 402623125 is 521326204.

It can be written as a sum of positive squares in 5 ways, for example, as 305620324 + 97002801 = 17482^2 + 9849^2 .

It is not a de Polignac number, because 402623125 - 2⁵ = 402623093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 402623125.

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 321474 + ... + 322723.

Almost surely, 2^402623125 is an apocalyptic number.

It is an amenable number.

402623125 is a deficient number, since it is larger than the sum of its proper divisors (100495513).

402623125 is an frugal number, since it uses more digits than its factorization.

402623125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644217 (or 644202 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 402623125 is about 20065.4709638224. The cubic root of 402623125 is about 738.4134043215.

Adding to 402623125 its reverse (521326204), we get a palindrome (923949329).

The spelling of 402623125 in words is "four hundred two million, six hundred twenty-three thousand, one hundred twenty-five".