25261398 has 12 divisors (see below), whose sum is σ = 54733068. Its totient is φ = 8420460.

The previous prime is 25261391. The next prime is 25261399. The reversal of 25261398 is 89316252.

25261398 is a `hidden beast` number, since 2 + 5 + 261 + 398 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25261391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 701688 + ... + 701723.

It is an arithmetic number, because the mean of its divisors is an integer number (4561089).

Almost surely, 2^25261398 is an apocalyptic number.

25261398 is an abundant number, since it is smaller than the sum of its proper divisors (29471670).

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

25261398 is a wasteful number, since it uses less digits than its factorization.

25261398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403419 (or 1403416 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 25261398 is about 5026.0718259890. The cubic root of 25261398 is about 293.4173522523.

The spelling of 25261398 in words is "twenty-five million, two hundred sixty-one thousand, three hundred ninety-eight".