25133121 has 24 divisors (see below), whose sum is σ = 39462696. Its totient is φ = 15321600.

The previous prime is 25133093. The next prime is 25133131. The reversal of 25133121 is 12133152.

It can be written as a sum of positive squares in 4 ways, for example, as 3370896 + 21762225 = 1836^2 + 4665^2 .

It is not a de Polignac number, because 25133121 - 2¹⁰ = 25132097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25133094 and 25133103.

It is not an unprimeable number, because it can be changed into a prime (25133131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12271 + ... + 14171.

It is an arithmetic number, because the mean of its divisors is an integer number (1644279).

Almost surely, 2^25133121 is an apocalyptic number.

It is an amenable number.

25133121 is a deficient number, since it is larger than the sum of its proper divisors (14329575).

25133121 is a wasteful number, since it uses less digits than its factorization.

25133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033 (or 2030 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 25133121 is about 5013.2944258242. The cubic root of 25133121 is about 292.9198528976.

Adding to 25133121 its reverse (12133152), we get a palindrome (37266273).

The spelling of 25133121 in words is "twenty-five million, one hundred thirty-three thousand, one hundred twenty-one".