25220905 has 8 divisors (see below), whose sum is σ = 30909312. Its totient is φ = 19747248.

The previous prime is 25220869. The next prime is 25220929. The reversal of 25220905 is 50902252.

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 25220905 - 2⁷ = 25220777 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 25220905.

It is an unprimeable number.

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, 53427 + ... + 53896.

It is an arithmetic number, because the mean of its divisors is an integer number (3863664).

Almost surely, 2^25220905 is an apocalyptic number.

It is an amenable number.

25220905 is a deficient number, since it is larger than the sum of its proper divisors (5688407).

25220905 is a wasteful number, since it uses less digits than its factorization.

25220905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107375.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 25220905 is about 5022.0419153966. The cubic root of 25220905 is about 293.2604896888.

The spelling of 25220905 in words is "twenty-five million, two hundred twenty thousand, nine hundred five".