25620505 has 8 divisors (see below), whose sum is σ = 32081472. Its totient is φ = 19605168.

The previous prime is 25620487. The next prime is 25620509. The reversal of 25620505 is 50502652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25620505 - 2⁵ = 25620473 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 25620505.

It is not an unprimeable number, because it can be changed into a prime (25620509) 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 7 ways as a sum of consecutive naturals, for example, 111279 + ... + 111508.

It is an arithmetic number, because the mean of its divisors is an integer number (4010184).

Almost surely, 2^25620505 is an apocalyptic number.

It is an amenable number.

25620505 is a deficient number, since it is larger than the sum of its proper divisors (6460967).

25620505 is a wasteful number, since it uses less digits than its factorization.

25620505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222815.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25620505 is about 5061.6701789034. The cubic root of 25620505 is about 294.8011875016.

The spelling of 25620505 in words is "twenty-five million, six hundred twenty thousand, five hundred five".