25323421 has 4 divisors (see below), whose sum is σ = 26813052. Its totient is φ = 23833792.

The previous prime is 25323407. The next prime is 25323443. The reversal of 25323421 is 12432352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 9211225 = 4014^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 25323421 - 2¹³ = 25315229 is a prime.

It is a super-2 number, since 2×25323421² = 1282551302286482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25323392 and 25323401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25323401) 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, 744790 + ... + 744823.

It is an arithmetic number, because the mean of its divisors is an integer number (6703263).

Almost surely, 2^25323421 is an apocalyptic number.

It is an amenable number.

25323421 is a deficient number, since it is larger than the sum of its proper divisors (1489631).

25323421 is a wasteful number, since it uses less digits than its factorization.

25323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489630.

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

The square root of 25323421 is about 5032.2381700393. The cubic root of 25323421 is about 293.6572934553.

Adding to 25323421 its reverse (12432352), we get a palindrome (37755773).

The spelling of 25323421 in words is "twenty-five million, three hundred twenty-three thousand, four hundred twenty-one".