6402130225 has 12 divisors (see below), whose sum is σ = 7946540620. Its totient is φ = 5116608000.

The previous prime is 6402130223. The next prime is 6402130253. The reversal of 6402130225 is 5220312046.

It can be written as a sum of positive squares in 6 ways, for example, as 209699361 + 6192430864 = 14481^2 + 78692^2 .

It is not a de Polignac number, because 6402130225 - 2¹ = 6402130223 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6402130225.

It is not an unprimeable number, because it can be changed into a prime (6402130223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101676 + ... + 152125.

Almost surely, 2^6402130225 is an apocalyptic number.

It is an amenable number.

6402130225 is a deficient number, since it is larger than the sum of its proper divisors (1544410395).

6402130225 is a wasteful number, since it uses less digits than its factorization.

6402130225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254820 (or 254815 counting only the distinct ones).

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

The square root of 6402130225 is about 80013.3127985587. The cubic root of 6402130225 is about 1856.8415028566.

The spelling of 6402130225 in words is "six billion, four hundred two million, one hundred thirty thousand, two hundred twenty-five".