25256449 has 4 divisors (see below), whose sum is σ = 25285936. Its totient is φ = 25226964.

The previous prime is 25256447. The next prime is 25256479. The reversal of 25256449 is 94465252.

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 25256449 - 2¹ = 25256447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25256447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13419 + ... + 15184.

It is an arithmetic number, because the mean of its divisors is an integer number (6321484).

Almost surely, 2^25256449 is an apocalyptic number.

It is an amenable number.

25256449 is a deficient number, since it is larger than the sum of its proper divisors (29487).

25256449 is an equidigital number, since it uses as much as digits as its factorization.

25256449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29486.

The product of its digits is 86400, while the sum is 37.

The square root of 25256449 is about 5025.5794690762. The cubic root of 25256449 is about 293.3981897167.

The spelling of 25256449 in words is "twenty-five million, two hundred fifty-six thousand, four hundred forty-nine".