25079121 has 6 divisors (see below), whose sum is σ = 36225410. Its totient is φ = 16719408.

The previous prime is 25079111. The next prime is 25079141. The reversal of 25079121 is 12197052.

It can be written as a sum of positive squares in only one way, i.e., 13950225 + 11128896 = 3735^2 + 3336^2 .

It is not a de Polignac number, because 25079121 - 2⁶ = 25079057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25079101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1393276 + ... + 1393293.

Almost surely, 2^25079121 is an apocalyptic number.

It is an amenable number.

25079121 is a deficient number, since it is larger than the sum of its proper divisors (11146289).

25079121 is a wasteful number, since it uses less digits than its factorization.

25079121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786575 (or 2786572 counting only the distinct ones).

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

The square root of 25079121 is about 5007.9058497540. The cubic root of 25079121 is about 292.7099172513.

It can be divided in two parts, 25079 and 121, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 25079121 in words is "twenty-five million, seventy-nine thousand, one hundred twenty-one".