25620259 has 4 divisors (see below), whose sum is σ = 29280304. Its totient is φ = 21960216.

The previous prime is 25620239. The next prime is 25620263. The reversal of 25620259 is 95202652.

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 25620259 - 2¹⁵ = 25587491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25620259.

It is not an unprimeable number, because it can be changed into a prime (25620209) 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, 1830012 + ... + 1830025.

It is an arithmetic number, because the mean of its divisors is an integer number (7320076).

Almost surely, 2^25620259 is an apocalyptic number.

25620259 is a deficient number, since it is larger than the sum of its proper divisors (3660045).

25620259 is an equidigital number, since it uses as much as digits as its factorization.

25620259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660044.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 25620259 is about 5061.6458785656. The cubic root of 25620259 is about 294.8002439693.

The spelling of 25620259 in words is "twenty-five million, six hundred twenty thousand, two hundred fifty-nine".