25261287 has 8 divisors (see below), whose sum is σ = 33877104. Its totient is φ = 16743168.

The previous prime is 25261283. The next prime is 25261297. The reversal of 25261287 is 78216252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25261287 - 2² = 25261283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25261283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23818 + ... + 24855.

It is an arithmetic number, because the mean of its divisors is an integer number (4234638).

Almost surely, 2^25261287 is an apocalyptic number.

25261287 is a deficient number, since it is larger than the sum of its proper divisors (8615817).

25261287 is a wasteful number, since it uses less digits than its factorization.

25261287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48849.

The product of its digits is 13440, while the sum is 33.

The square root of 25261287 is about 5026.0607835560. The cubic root of 25261287 is about 293.4169224876.

The spelling of 25261287 in words is "twenty-five million, two hundred sixty-one thousand, two hundred eighty-seven".