8406139225 has 27 divisors (see below), whose sum is σ = 11464236511. Its totient is φ = 6109888400.

The previous prime is 8406139219. The next prime is 8406139237. The reversal of 8406139225 is 5229316048.

The square root of 8406139225 is 91685.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3026210121 + 5379929104 = 55011^2 + 73348^2 .

It is not a de Polignac number, because 8406139225 - 2⁷ = 8406139097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5041842 + ... + 5043508.

Almost surely, 2^8406139225 is an apocalyptic number.

8406139225 is the 91685-th square number.

8406139225 is the 45843-rd centered octagonal number.

It is an amenable number.

8406139225 is a deficient number, since it is larger than the sum of its proper divisors (3058097286).

8406139225 is an equidigital number, since it uses as much as digits as its factorization.

8406139225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366 (or 1683 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The cubic root of 8406139225 is about 2033.2878220725.

The spelling of 8406139225 in words is "eight billion, four hundred six million, one hundred thirty-nine thousand, two hundred twenty-five".