25352643 has 4 divisors (see below), whose sum is σ = 33803528. Its totient is φ = 16901760.

The previous prime is 25352617. The next prime is 25352651. The reversal of 25352643 is 34625352.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25352643 - 2⁵ = 25352611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25352643.

It is not an unprimeable number, because it can be changed into a prime (25352653) 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, 4225438 + ... + 4225443.

It is an arithmetic number, because the mean of its divisors is an integer number (8450882).

Almost surely, 2^25352643 is an apocalyptic number.

25352643 is a deficient number, since it is larger than the sum of its proper divisors (8450885).

25352643 is an equidigital number, since it uses as much as digits as its factorization.

25352643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8450884.

The product of its digits is 21600, while the sum is 30.

The square root of 25352643 is about 5035.1408123309. The cubic root of 25352643 is about 293.7702054609.

Adding to 25352643 its reverse (34625352), we get a palindrome (59977995).

The spelling of 25352643 in words is "twenty-five million, three hundred fifty-two thousand, six hundred forty-three".