25345247 has 4 divisors (see below), whose sum is σ = 25450656. Its totient is φ = 25239840.

The previous prime is 25345219. The next prime is 25345273. The reversal of 25345247 is 74254352.

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 25345247 - 2¹⁶ = 25279711 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 (25345207) 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, 52343 + ... + 52824.

It is an arithmetic number, because the mean of its divisors is an integer number (6362664).

Almost surely, 2^25345247 is an apocalyptic number.

25345247 is a deficient number, since it is larger than the sum of its proper divisors (105409).

25345247 is a wasteful number, since it uses less digits than its factorization.

25345247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105408.

The product of its digits is 33600, while the sum is 32.

The square root of 25345247 is about 5034.4063205109. The cubic root of 25345247 is about 293.7416359773.

Adding to 25345247 its reverse (74254352), we get a palindrome (99599599).

The spelling of 25345247 in words is "twenty-five million, three hundred forty-five thousand, two hundred forty-seven".