25791081 has 4 divisors (see below), whose sum is σ = 34388112. Its totient is φ = 17194052.

The previous prime is 25791079. The next prime is 25791127. The reversal of 25791081 is 18019752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25791081 - 2¹ = 25791079 is a prime.

It is a super-2 number, since 2×25791081² = 1330359718297122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25791061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298511 + ... + 4298516.

It is an arithmetic number, because the mean of its divisors is an integer number (8597028).

Almost surely, 2^25791081 is an apocalyptic number.

It is an amenable number.

25791081 is a deficient number, since it is larger than the sum of its proper divisors (8597031).

25791081 is an equidigital number, since it uses as much as digits as its factorization.

25791081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597030.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 25791081 is about 5078.4920005844. The cubic root of 25791081 is about 295.4539826018.

The spelling of 25791081 in words is "twenty-five million, seven hundred ninety-one thousand, eighty-one".