25315121 has 8 divisors (see below), whose sum is σ = 27647424. Its totient is φ = 23037840.

The previous prime is 25315117. The next prime is 25315123. The reversal of 25315121 is 12151352.

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 25315121 - 2² = 25315117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25315093 and 25315102.

It is not an unprimeable number, because it can be changed into a prime (25315123) 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, 12791 + ... + 14636.

It is an arithmetic number, because the mean of its divisors is an integer number (3455928).

Almost surely, 2^25315121 is an apocalyptic number.

It is an amenable number.

25315121 is a deficient number, since it is larger than the sum of its proper divisors (2332303).

25315121 is a wasteful number, since it uses less digits than its factorization.

25315121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27511.

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

The square root of 25315121 is about 5031.4134197062. The cubic root of 25315121 is about 293.6252069286.

Adding to 25315121 its reverse (12151352), we get a palindrome (37466473).

The spelling of 25315121 in words is "twenty-five million, three hundred fifteen thousand, one hundred twenty-one".