25456121 has 8 divisors (see below), whose sum is σ = 26220264. Its totient is φ = 24698880.

The previous prime is 25456087. The next prime is 25456159. The reversal of 25456121 is 12165452.

It can be written as a sum of positive squares in 4 ways, for example, as 1092025 + 24364096 = 1045^2 + 4936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25456121 - 2¹⁸ = 25193977 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25456721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6305 + ... + 9521.

It is an arithmetic number, because the mean of its divisors is an integer number (3277533).

Almost surely, 2^25456121 is an apocalyptic number.

It is an amenable number.

25456121 is a deficient number, since it is larger than the sum of its proper divisors (764143).

25456121 is a wasteful number, since it uses less digits than its factorization.

25456121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451.

The product of its digits is 2400, while the sum is 26.

The square root of 25456121 is about 5045.4059301507. The cubic root of 25456121 is about 294.1693418727.

The spelling of 25456121 in words is "twenty-five million, four hundred fifty-six thousand, one hundred twenty-one".