25445279 has 4 divisors (see below), whose sum is σ = 25502400. Its totient is φ = 25388160.

The previous prime is 25445269. The next prime is 25445281. The reversal of 25445279 is 97254452.

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

It is a cyclic number.

It is not a de Polignac number, because 25445279 - 2¹² = 25441183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25445219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27887 + ... + 28784.

It is an arithmetic number, because the mean of its divisors is an integer number (6375600).

Almost surely, 2^25445279 is an apocalyptic number.

25445279 is a deficient number, since it is larger than the sum of its proper divisors (57121).

25445279 is an equidigital number, since it uses as much as digits as its factorization.

25445279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57120.

The product of its digits is 100800, while the sum is 38.

The square root of 25445279 is about 5044.3313729373. The cubic root of 25445279 is about 294.1275727842.

The spelling of 25445279 in words is "twenty-five million, four hundred forty-five thousand, two hundred seventy-nine".