25513121 has 8 divisors (see below), whose sum is σ = 26006400. Its totient is φ = 25024432.

The previous prime is 25513109. The next prime is 25513199. The reversal of 25513121 is 12131552.

It is a happy number.

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 25513121 - 2¹⁸ = 25250977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25513093 and 25513102.

It is not an unprimeable number, because it can be changed into a prime (25515121) 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, 11336 + ... + 13398.

It is an arithmetic number, because the mean of its divisors is an integer number (3250800).

Almost surely, 2^25513121 is an apocalyptic number.

It is an amenable number.

25513121 is a deficient number, since it is larger than the sum of its proper divisors (493279).

25513121 is a wasteful number, since it uses less digits than its factorization.

25513121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295.

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

The square root of 25513121 is about 5051.0514746932. The cubic root of 25513121 is about 294.3887410099.

Adding to 25513121 its reverse (12131552), we get a palindrome (37644673).

The spelling of 25513121 in words is "twenty-five million, five hundred thirteen thousand, one hundred twenty-one".