25812997 has 8 divisors (see below), whose sum is σ = 29697152. Its totient is φ = 21978000.

The previous prime is 25812991. The next prime is 25813009. The reversal of 25812997 is 79921852.

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 25812997 - 2⁷ = 25812869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25812991) 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, 11154 + ... + 13267.

It is an arithmetic number, because the mean of its divisors is an integer number (3712144).

Almost surely, 2^25812997 is an apocalyptic number.

It is an amenable number.

25812997 is a deficient number, since it is larger than the sum of its proper divisors (3884155).

25812997 is a wasteful number, since it uses less digits than its factorization.

25812997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24579.

The product of its digits is 90720, while the sum is 43.

The square root of 25812997 is about 5080.6492695324. The cubic root of 25812997 is about 295.5376463594.

The spelling of 25812997 in words is "twenty-five million, eight hundred twelve thousand, nine hundred ninety-seven".