25368121 has 4 divisors (see below), whose sum is σ = 25378852. Its totient is φ = 25357392.

The previous prime is 25368073. The next prime is 25368139. The reversal of 25368121 is 12186352.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 22934521 + 2433600 = 4789^2 + 1560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25368121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25368121.

It is not an unprimeable number, because it can be changed into a prime (25368221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90 + ... + 7123.

It is an arithmetic number, because the mean of its divisors is an integer number (6344713).

Almost surely, 2^25368121 is an apocalyptic number.

It is an amenable number.

25368121 is a deficient number, since it is larger than the sum of its proper divisors (10731).

25368121 is an equidigital number, since it uses as much as digits as its factorization.

25368121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10730.

The product of its digits is 2880, while the sum is 28.

The square root of 25368121 is about 5036.6775755452. The cubic root of 25368121 is about 293.8299763525.

The spelling of 25368121 in words is "twenty-five million, three hundred sixty-eight thousand, one hundred twenty-one".