25453643 has 4 divisors (see below), whose sum is σ = 25488288. Its totient is φ = 25419000.

The previous prime is 25453613. The next prime is 25453657. The reversal of 25453643 is 34635452.

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 25453643 - 2¹⁰ = 25452619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25453613) 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, 16196 + ... + 17697.

It is an arithmetic number, because the mean of its divisors is an integer number (6372072).

Almost surely, 2^25453643 is an apocalyptic number.

25453643 is a deficient number, since it is larger than the sum of its proper divisors (34645).

25453643 is an equidigital number, since it uses as much as digits as its factorization.

25453643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34644.

The product of its digits is 43200, while the sum is 32.

The square root of 25453643 is about 5045.1603542405. The cubic root of 25453643 is about 294.1597963586.

The spelling of 25453643 in words is "twenty-five million, four hundred fifty-three thousand, six hundred forty-three".