6405131225 has 12 divisors (see below), whose sum is σ = 8409561084. Its totient is φ = 4822686720.

The previous prime is 6405131219. The next prime is 6405131231. The reversal of 6405131225 is 5221315046.

It is an interprime number because it is at equal distance from previous prime (6405131219) and next prime (6405131231).

It can be written as a sum of positive squares in 6 ways, for example, as 10201 + 6405121024 = 101^2 + 80032^2 .

It is not a de Polignac number, because 6405131225 - 2⁸ = 6405130969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7535024 + ... + 7535873.

It is an arithmetic number, because the mean of its divisors is an integer number (700796757).

Almost surely, 2^6405131225 is an apocalyptic number.

It is an amenable number.

6405131225 is a deficient number, since it is larger than the sum of its proper divisors (2004429859).

6405131225 is a wasteful number, since it uses less digits than its factorization.

6405131225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15070924 (or 15070919 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 6405131225 is about 80032.0637307323. The cubic root of 6405131225 is about 1857.1315891610.

The spelling of 6405131225 in words is "six billion, four hundred five million, one hundred thirty-one thousand, two hundred twenty-five".