25113421 has 4 divisors (see below), whose sum is σ = 26435200. Its totient is φ = 23791644.

The previous prime is 25113377. The next prime is 25113457. The reversal of 25113421 is 12431152.

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 25113421 - 2⁹ = 25112909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1321759 = 25113421 / (2 + 5 + 1 + 1 + 3 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25113461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660861 + ... + 660898.

It is an arithmetic number, because the mean of its divisors is an integer number (6608800).

Almost surely, 2^25113421 is an apocalyptic number.

It is an amenable number.

25113421 is a deficient number, since it is larger than the sum of its proper divisors (1321779).

25113421 is a wasteful number, since it uses less digits than its factorization.

25113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321778.

The product of its digits is 240, while the sum is 19.

The square root of 25113421 is about 5011.3292647760. The cubic root of 25113421 is about 292.8433001360.

Adding to 25113421 its reverse (12431152), we get a palindrome (37544573).

The spelling of 25113421 in words is "twenty-five million, one hundred thirteen thousand, four hundred twenty-one".