25915047 has 4 divisors (see below), whose sum is σ = 34553400. Its totient is φ = 17276696.

The previous prime is 25915033. The next prime is 25915049. The reversal of 25915047 is 74051952.

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 25915047 - 2¹⁹ = 25390759 is a prime.

It is a super-2 number, since 2×25915047² = 1343179322024418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25914999 and 25915017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25915049) 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, 4319172 + ... + 4319177.

It is an arithmetic number, because the mean of its divisors is an integer number (8638350).

Almost surely, 2^25915047 is an apocalyptic number.

25915047 is a deficient number, since it is larger than the sum of its proper divisors (8638353).

25915047 is an equidigital number, since it uses as much as digits as its factorization.

25915047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8638352.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 25915047 is about 5090.6823707633. The cubic root of 25915047 is about 295.9265971812.

Adding to 25915047 its reverse (74051952), we get a palindrome (99966999).

The spelling of 25915047 in words is "twenty-five million, nine hundred fifteen thousand, forty-seven".