25013121 has 16 divisors (see below), whose sum is σ = 39773184. Its totient is φ = 13671504.

The previous prime is 25013113. The next prime is 25013123. The reversal of 25013121 is 12131052.

It is not a de Polignac number, because 25013121 - 2³ = 25013113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25013121.

It is not an unprimeable number, because it can be changed into a prime (25013123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25411 + ... + 26376.

It is an arithmetic number, because the mean of its divisors is an integer number (2485824).

Almost surely, 2^25013121 is an apocalyptic number.

25013121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25013121 is a deficient number, since it is larger than the sum of its proper divisors (14760063).

25013121 is a wasteful number, since it uses less digits than its factorization.

25013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51820.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 25013121 is about 5001.3119278845. The cubic root of 25013121 is about 292.4529195902.

Adding to 25013121 its reverse (12131052), we get a palindrome (37144173).

The spelling of 25013121 in words is "twenty-five million, thirteen thousand, one hundred twenty-one".