79121025 has 27 divisors (see below), whose sum is σ = 141953929. Its totient is φ = 42126720.

The previous prime is 79121011. The next prime is 79121033. The reversal of 79121025 is 52012197.

The square root of 79121025 is 8895.

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 53361 + 79067664 = 231^2 + 8892^2 .

It is not a de Polignac number, because 79121025 - 2¹⁵ = 79088257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79121025.

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, 133129 + ... + 133721.

Almost surely, 2^79121025 is an apocalyptic number.

79121025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79121025 is the 8895-th square number.

79121025 is the 4448-th centered octagonal number.

It is an amenable number.

79121025 is a deficient number, since it is larger than the sum of its proper divisors (62832904).

79121025 is an equidigital number, since it uses as much as digits as its factorization.

79121025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The cubic root of 79121025 is about 429.3030443929.

It can be divided in two parts, 79 and 121025, that added together give a square (121104 = 348²).

The spelling of 79121025 in words is "seventy-nine million, one hundred twenty-one thousand, twenty-five".