25802997 has 16 divisors (see below), whose sum is σ = 38242368. Its totient is φ = 15342080.

The previous prime is 25802993. The next prime is 25802999. The reversal of 25802997 is 79920852.

It is a cyclic number.

It is not a de Polignac number, because 25802997 - 2² = 25802993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25802993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5628 + ... + 9125.

It is an arithmetic number, because the mean of its divisors is an integer number (2390148).

Almost surely, 2^25802997 is an apocalyptic number.

It is an amenable number.

25802997 is a deficient number, since it is larger than the sum of its proper divisors (12439371).

25802997 is a wasteful number, since it uses less digits than its factorization.

25802997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14820.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 25802997 is about 5079.6650480125. The cubic root of 25802997 is about 295.4994774971.

The spelling of 25802997 in words is "twenty-five million, eight hundred two thousand, nine hundred ninety-seven".