25426121 has 4 divisors (see below), whose sum is σ = 29058432. Its totient is φ = 21793812.

The previous prime is 25426117. The next prime is 25426129. The reversal of 25426121 is 12162452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25426121 - 2² = 25426117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25426129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816145 + ... + 1816158.

It is an arithmetic number, because the mean of its divisors is an integer number (7264608).

Almost surely, 2^25426121 is an apocalyptic number.

It is an amenable number.

25426121 is a deficient number, since it is larger than the sum of its proper divisors (3632311).

25426121 is an equidigital number, since it uses as much as digits as its factorization.

25426121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632310.

The product of its digits is 960, while the sum is 23.

The square root of 25426121 is about 5042.4320520955. The cubic root of 25426121 is about 294.0537370730.

Adding to 25426121 its reverse (12162452), we get a palindrome (37588573).

The spelling of 25426121 in words is "twenty-five million, four hundred twenty-six thousand, one hundred twenty-one".