402521012 has 12 divisors (see below), whose sum is σ = 712327140. Its totient is φ = 198998976.

The previous prime is 402521011. The next prime is 402521017. The reversal of 402521012 is 210125204.

It can be written as a sum of positive squares in 2 ways, for example, as 226321936 + 176199076 = 15044^2 + 13274^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402521011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564983 + ... + 565694.

It is an arithmetic number, because the mean of its divisors is an integer number (59360595).

Almost surely, 2^402521012 is an apocalyptic number.

It is an amenable number.

402521012 is a deficient number, since it is larger than the sum of its proper divisors (309806128).

402521012 is a wasteful number, since it uses less digits than its factorization.

402521012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130770 (or 1130768 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 402521012 is about 20062.9263069972. The cubic root of 402521012 is about 738.3509737434.

Adding to 402521012 its reverse (210125204), we get a palindrome (612646216).

The spelling of 402521012 in words is "four hundred two million, five hundred twenty-one thousand, twelve".