25620617 has 4 divisors (see below), whose sum is σ = 27949776. Its totient is φ = 23291460.

The previous prime is 25620589. The next prime is 25620631. The reversal of 25620617 is 71602652.

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 25620617 - 2¹⁰ = 25619593 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 25620617.

It is not an unprimeable number, because it can be changed into a prime (25620667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164563 + ... + 1164584.

It is an arithmetic number, because the mean of its divisors is an integer number (6987444).

Almost surely, 2^25620617 is an apocalyptic number.

It is an amenable number.

25620617 is a deficient number, since it is larger than the sum of its proper divisors (2329159).

25620617 is a wasteful number, since it uses less digits than its factorization.

25620617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329158.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 25620617 is about 5061.6812424332. The cubic root of 25620617 is about 294.8016170753.

The spelling of 25620617 in words is "twenty-five million, six hundred twenty thousand, six hundred seventeen".