25620345 has 24 divisors (see below), whose sum is σ = 44768256. Its totient is φ = 13553568.

The previous prime is 25620281. The next prime is 25620347. The reversal of 25620345 is 54302652.

25620345 is a `hidden beast` number, since 2 + 5 + 620 + 34 + 5 = 666.

It is not a de Polignac number, because 25620345 - 2⁶ = 25620281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25620347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3474 + ... + 7956.

It is an arithmetic number, because the mean of its divisors is an integer number (1865344).

Almost surely, 2^25620345 is an apocalyptic number.

It is an amenable number.

25620345 is a deficient number, since it is larger than the sum of its proper divisors (19147911).

25620345 is a wasteful number, since it uses less digits than its factorization.

25620345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621 (or 4618 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 25620345 is about 5061.6543738189. The cubic root of 25620345 is about 294.8005738227.

Adding to 25620345 its reverse (54302652), we get a palindrome (79922997).

The spelling of 25620345 in words is "twenty-five million, six hundred twenty thousand, three hundred forty-five".