25897550 has 48 divisors (see below), whose sum is σ = 55999392. Its totient is φ = 8726400.

The previous prime is 25897537. The next prime is 25897559. The reversal of 25897550 is 5579852.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25897498 and 25897507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20744 + ... + 21956.

It is an arithmetic number, because the mean of its divisors is an integer number (1166654).

Almost surely, 2^25897550 is an apocalyptic number.

25897550 is an abundant number, since it is smaller than the sum of its proper divisors (30101842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25897550 is a wasteful number, since it uses less digits than its factorization.

25897550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 25897550 is about 5088.9635487003. The cubic root of 25897550 is about 295.8599821703.

The spelling of 25897550 in words is "twenty-five million, eight hundred ninety-seven thousand, five hundred fifty".