25320449 has 8 divisors (see below), whose sum is σ = 31568448. Its totient is φ = 19730160.

The previous prime is 25320443. The next prime is 25320467. The reversal of 25320449 is 94402352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25320449 - 2⁴ = 25320433 is a prime.

It is a super-2 number, since 2×25320449² = 1282250275123202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25320443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164342 + ... + 164495.

It is an arithmetic number, because the mean of its divisors is an integer number (3946056).

Almost surely, 2^25320449 is an apocalyptic number.

It is an amenable number.

25320449 is a deficient number, since it is larger than the sum of its proper divisors (6247999).

25320449 is a wasteful number, since it uses less digits than its factorization.

25320449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328855.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 25320449 is about 5031.9428653354. The cubic root of 25320449 is about 293.6458049651.

It can be divided in two parts, 253 and 20449, that added together give a palindrome (20702).

The spelling of 25320449 in words is "twenty-five million, three hundred twenty thousand, four hundred forty-nine".