25942643 has 8 divisors (see below), whose sum is σ = 27122688. Its totient is φ = 24766984.

The previous prime is 25942639. The next prime is 25942673. The reversal of 25942643 is 34624952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25942643 - 2² = 25942639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25942603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19196 + ... + 20502.

It is an arithmetic number, because the mean of its divisors is an integer number (3390336).

Almost surely, 2^25942643 is an apocalyptic number.

25942643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25942643 is a deficient number, since it is larger than the sum of its proper divisors (1180045).

25942643 is a wasteful number, since it uses less digits than its factorization.

25942643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193.

The product of its digits is 51840, while the sum is 35.

The square root of 25942643 is about 5093.3920917204. The cubic root of 25942643 is about 296.0316004429.

The spelling of 25942643 in words is "twenty-five million, nine hundred forty-two thousand, six hundred forty-three".