25413643 has 4 divisors (see below), whose sum is σ = 26518608. Its totient is φ = 24308680.

The previous prime is 25413631. The next prime is 25413653. The reversal of 25413643 is 34631452.

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 25413643 - 2⁵ = 25413611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25413653) 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, 552448 + ... + 552493.

It is an arithmetic number, because the mean of its divisors is an integer number (6629652).

Almost surely, 2^25413643 is an apocalyptic number.

25413643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25413643 is a deficient number, since it is larger than the sum of its proper divisors (1104965).

25413643 is a wasteful number, since it uses less digits than its factorization.

25413643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104964.

The product of its digits is 8640, while the sum is 28.

The square root of 25413643 is about 5041.1946004891. The cubic root of 25413643 is about 294.0056264060.

The spelling of 25413643 in words is "twenty-five million, four hundred thirteen thousand, six hundred forty-three".