25497847 has 4 divisors (see below), whose sum is σ = 26187016. Its totient is φ = 24808680.

The previous prime is 25497833. The next prime is 25497863. The reversal of 25497847 is 74879452.

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 25497847 - 2¹⁵ = 25465079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25497797 and 25497806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25497827) 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, 344529 + ... + 344602.

It is an arithmetic number, because the mean of its divisors is an integer number (6546754).

Almost surely, 2^25497847 is an apocalyptic number.

25497847 is a deficient number, since it is larger than the sum of its proper divisors (689169).

25497847 is an equidigital number, since it uses as much as digits as its factorization.

25497847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689168.

The product of its digits is 564480, while the sum is 46.

The square root of 25497847 is about 5049.5392859151. The cubic root of 25497847 is about 294.3299818164.

It can be divided in two parts, 254978 and 47, that added together give a square (255025 = 505²).

The spelling of 25497847 in words is "twenty-five million, four hundred ninety-seven thousand, eight hundred forty-seven".