25115321 has 16 divisors (see below), whose sum is σ = 32962560. Its totient is φ = 18539280.

The previous prime is 25115317. The next prime is 25115339. The reversal of 25115321 is 12351152.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25115321 - 2² = 25115317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25115293 and 25115302.

It is not an unprimeable number, because it can be changed into a prime (25115371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7121 + ... + 10046.

It is an arithmetic number, because the mean of its divisors is an integer number (2060160).

Almost surely, 2^25115321 is an apocalyptic number.

It is an amenable number.

25115321 is a deficient number, since it is larger than the sum of its proper divisors (7847239).

25115321 is a wasteful number, since it uses less digits than its factorization.

25115321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17204.

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

The square root of 25115321 is about 5011.5188316517. The cubic root of 25115321 is about 292.8506851413.

Adding to 25115321 its reverse (12351152), we get a palindrome (37466473).

The spelling of 25115321 in words is "twenty-five million, one hundred fifteen thousand, three hundred twenty-one".