25621955 has 8 divisors (see below), whose sum is σ = 30814992. Its totient is φ = 20451808.

The previous prime is 25621927. The next prime is 25621961. The reversal of 25621955 is 55912652.

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 25621955 - 2¹⁴ = 25605571 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3152 + ... + 7821.

It is an arithmetic number, because the mean of its divisors is an integer number (3851874).

Almost surely, 2^25621955 is an apocalyptic number.

25621955 is a deficient number, since it is larger than the sum of its proper divisors (5193037).

25621955 is a wasteful number, since it uses less digits than its factorization.

25621955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445.

The product of its digits is 27000, while the sum is 35.

The square root of 25621955 is about 5061.8134102316. The cubic root of 25621955 is about 294.8067488500.

The spelling of 25621955 in words is "twenty-five million, six hundred twenty-one thousand, nine hundred fifty-five".