791578225 has 27 divisors (see below), whose sum is σ = 1045851681. Its totient is φ = 594211200.

The previous prime is 791578223. The next prime is 791578243. The reversal of 791578225 is 522875197.

It is a happy number.

The square root of 791578225 is 28135.

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

It can be written as a sum of positive squares in 4 ways, for example, as 18515809 + 773062416 = 4303^2 + 27804^2 .

It is not a de Polignac number, because 791578225 - 2¹ = 791578223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791578223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2391310 + ... + 2391640.

Almost surely, 2^791578225 is an apocalyptic number.

791578225 is the 28135-th square number.

791578225 is the 14068-th centered octagonal number.

It is an amenable number.

791578225 is a deficient number, since it is larger than the sum of its proper divisors (254273456).

791578225 is an equidigital number, since it uses as much as digits as its factorization.

791578225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 353 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The cubic root of 791578225 is about 925.0487337363.

The spelling of 791578225 in words is "seven hundred ninety-one million, five hundred seventy-eight thousand, two hundred twenty-five".