25621089 has 8 divisors (see below), whose sum is σ = 36789312. Its totient is φ = 15766800.

The previous prime is 25621087. The next prime is 25621109. The reversal of 25621089 is 98012652.

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

It is not a de Polignac number, because 25621089 - 2¹ = 25621087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25621081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328437 + ... + 328514.

It is an arithmetic number, because the mean of its divisors is an integer number (4598664).

Almost surely, 2^25621089 is an apocalyptic number.

It is an amenable number.

25621089 is a deficient number, since it is larger than the sum of its proper divisors (11168223).

25621089 is a wasteful number, since it uses less digits than its factorization.

25621089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656967.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 25621089 is about 5061.7278670430. The cubic root of 25621089 is about 294.8034274078.

The spelling of 25621089 in words is "twenty-five million, six hundred twenty-one thousand, eighty-nine".