25869497 has 4 divisors (see below), whose sum is σ = 26111376. Its totient is φ = 25627620.

The previous prime is 25869491. The next prime is 25869509. The reversal of 25869497 is 79496852.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25869497 - 2¹² = 25865401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25869491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120779 + ... + 120992.

It is an arithmetic number, because the mean of its divisors is an integer number (6527844).

Almost surely, 2^25869497 is an apocalyptic number.

It is an amenable number.

25869497 is a deficient number, since it is larger than the sum of its proper divisors (241879).

25869497 is a wasteful number, since it uses less digits than its factorization.

25869497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241878.

The product of its digits is 1088640, while the sum is 50.

The square root of 25869497 is about 5086.2065431911. The cubic root of 25869497 is about 295.7531154496.

The spelling of 25869497 in words is "twenty-five million, eight hundred sixty-nine thousand, four hundred ninety-seven".