25620261 has 4 divisors (see below), whose sum is σ = 34160352. Its totient is φ = 17080172.

The previous prime is 25620239. The next prime is 25620263. The reversal of 25620261 is 16202652.

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 25620261 - 2⁹ = 25619749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25620263) 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, 4270041 + ... + 4270046.

It is an arithmetic number, because the mean of its divisors is an integer number (8540088).

Almost surely, 2^25620261 is an apocalyptic number.

It is an amenable number.

25620261 is a deficient number, since it is larger than the sum of its proper divisors (8540091).

25620261 is an equidigital number, since it uses as much as digits as its factorization.

25620261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8540090.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 25620261 is about 5061.6460761298. The cubic root of 25620261 is about 294.8002516403.

The spelling of 25620261 in words is "twenty-five million, six hundred twenty thousand, two hundred sixty-one".