25452321 has 4 divisors (see below), whose sum is σ = 33936432. Its totient is φ = 16968212.

The previous prime is 25452319. The next prime is 25452331. The reversal of 25452321 is 12325452.

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 25452321 - 2¹ = 25452319 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 25452291 and 25452300.

It is not an unprimeable number, because it can be changed into a prime (25452331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4242051 + ... + 4242056.

It is an arithmetic number, because the mean of its divisors is an integer number (8484108).

Almost surely, 2^25452321 is an apocalyptic number.

It is an amenable number.

25452321 is a deficient number, since it is larger than the sum of its proper divisors (8484111).

25452321 is an equidigital number, since it uses as much as digits as its factorization.

25452321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8484110.

The product of its digits is 2400, while the sum is 24.

The square root of 25452321 is about 5045.0293358909. The cubic root of 25452321 is about 294.1547036235.

Adding to 25452321 its reverse (12325452), we get a palindrome (37777773).

The spelling of 25452321 in words is "twenty-five million, four hundred fifty-two thousand, three hundred twenty-one".