25791387 has 8 divisors (see below), whose sum is σ = 34710336. Its totient is φ = 17033352.

The previous prime is 25791383. The next prime is 25791401. The reversal of 25791387 is 78319752.

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

It is not a de Polignac number, because 25791387 - 2² = 25791383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25791383) 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, 39853 + ... + 40494.

It is an arithmetic number, because the mean of its divisors is an integer number (4338792).

Almost surely, 2^25791387 is an apocalyptic number.

25791387 is a deficient number, since it is larger than the sum of its proper divisors (8918949).

25791387 is a wasteful number, since it uses less digits than its factorization.

25791387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80457.

The product of its digits is 105840, while the sum is 42.

The square root of 25791387 is about 5078.5221275485. The cubic root of 25791387 is about 295.4551510750.

The spelling of 25791387 in words is "twenty-five million, seven hundred ninety-one thousand, three hundred eighty-seven".