25421233 has 4 divisors (see below), whose sum is σ = 26526528. Its totient is φ = 24315940.

The previous prime is 25421161. The next prime is 25421237. The reversal of 25421233 is 33212452.

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 25421233 - 2⁹ = 25420721 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25421237) 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, 552613 + ... + 552658.

It is an arithmetic number, because the mean of its divisors is an integer number (6631632).

Almost surely, 2^25421233 is an apocalyptic number.

25421233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25421233 is a deficient number, since it is larger than the sum of its proper divisors (1105295).

25421233 is a wasteful number, since it uses less digits than its factorization.

25421233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105294.

The product of its digits is 1440, while the sum is 22.

The square root of 25421233 is about 5041.9473420495. The cubic root of 25421233 is about 294.0348925838.

Adding to 25421233 its reverse (33212452), we get a palindrome (58633685).

The spelling of 25421233 in words is "twenty-five million, four hundred twenty-one thousand, two hundred thirty-three".