25251121 has 12 divisors (see below), whose sum is σ = 30092580. Its totient is φ = 21114240.

The previous prime is 25251101. The next prime is 25251139. The reversal of 25251121 is 12115252.

It can be written as a sum of positive squares in 2 ways, for example, as 14288400 + 10962721 = 3780^2 + 3311^2 .

It is not a de Polignac number, because 25251121 - 2⁵ = 25251089 is a prime.

It is a super-3 number, since 3×25251121³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (25251101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4276 + ... + 8293.

It is an arithmetic number, because the mean of its divisors is an integer number (2507715).

Almost surely, 2^25251121 is an apocalyptic number.

It is an amenable number.

25251121 is a deficient number, since it is larger than the sum of its proper divisors (4841459).

25251121 is a wasteful number, since it uses less digits than its factorization.

25251121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12624 (or 12617 counting only the distinct ones).

The product of its digits is 200, while the sum is 19.

The square root of 25251121 is about 5025.0493529915. The cubic root of 25251121 is about 293.3775568942.

Adding to 25251121 its reverse (12115252), we get a palindrome (37366373).

The spelling of 25251121 in words is "twenty-five million, two hundred fifty-one thousand, one hundred twenty-one".