7938121225 has 6 divisors (see below), whose sum is σ = 9843270350. Its totient is φ = 6350496960.

The previous prime is 7938121199. The next prime is 7938121241. The reversal of 7938121225 is 5221218397.

It can be written as a sum of positive squares in 3 ways, for example, as 2578709961 + 5359411264 = 50781^2 + 73208^2 .

It is not a de Polignac number, because 7938121225 - 2¹¹ = 7938119177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158762400 + ... + 158762449.

Almost surely, 2^7938121225 is an apocalyptic number.

It is an amenable number.

7938121225 is a deficient number, since it is larger than the sum of its proper divisors (1905149125).

7938121225 is a wasteful number, since it uses less digits than its factorization.

7938121225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317524859 (or 317524854 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 7938121225 is about 89096.1347365866. The cubic root of 7938121225 is about 1994.8300829105.

The spelling of 7938121225 in words is "seven billion, nine hundred thirty-eight million, one hundred twenty-one thousand, two hundred twenty-five".