25740287 has 4 divisors (see below), whose sum is σ = 25852920. Its totient is φ = 25627656.

The previous prime is 25740263. The next prime is 25740293. The reversal of 25740287 is 78204752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25740287 - 2⁸ = 25740031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25740257) 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, 55973 + ... + 56430.

It is an arithmetic number, because the mean of its divisors is an integer number (6463230).

Almost surely, 2^25740287 is an apocalyptic number.

25740287 is a deficient number, since it is larger than the sum of its proper divisors (112633).

25740287 is a wasteful number, since it uses less digits than its factorization.

25740287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112632.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 25740287 is about 5073.4886419504. The cubic root of 25740287 is about 295.2598954498.

The spelling of 25740287 in words is "twenty-five million, seven hundred forty thousand, two hundred eighty-seven".