25338421 has 4 divisors (see below), whose sum is σ = 25450272. Its totient is φ = 25226572.

The previous prime is 25338407. The next prime is 25338473. The reversal of 25338421 is 12483352.

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 25338421 - 2²¹ = 23241269 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 25338421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25338491) 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, 55585 + ... + 56038.

It is an arithmetic number, because the mean of its divisors is an integer number (6362568).

Almost surely, 2^25338421 is an apocalyptic number.

It is an amenable number.

25338421 is a deficient number, since it is larger than the sum of its proper divisors (111851).

25338421 is a wasteful number, since it uses less digits than its factorization.

25338421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111850.

The product of its digits is 5760, while the sum is 28.

The square root of 25338421 is about 5033.7283399087. The cubic root of 25338421 is about 293.7152633740.

The spelling of 25338421 in words is "twenty-five million, three hundred thirty-eight thousand, four hundred twenty-one".