25153121 has 24 divisors (see below), whose sum is σ = 31299840. Its totient is φ = 20109600.

The previous prime is 25153109. The next prime is 25153123. The reversal of 25153121 is 12135152.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25153121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25153093 and 25153102.

It is not an unprimeable number, because it can be changed into a prime (25153123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43766 + ... + 44336.

It is an arithmetic number, because the mean of its divisors is an integer number (1304160).

Almost surely, 2^25153121 is an apocalyptic number.

It is an amenable number.

25153121 is a deficient number, since it is larger than the sum of its proper divisors (6146719).

25153121 is a wasteful number, since it uses less digits than its factorization.

25153121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 638 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 25153121 is about 5015.2887254873. The cubic root of 25153121 is about 292.9975305270.

Adding to 25153121 its reverse (12135152), we get a palindrome (37288273).

The spelling of 25153121 in words is "twenty-five million, one hundred fifty-three thousand, one hundred twenty-one".