25090643 has 4 divisors (see below), whose sum is σ = 25209768. Its totient is φ = 24971520.

The previous prime is 25090627. The next prime is 25090669. The reversal of 25090643 is 34609052.

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 25090643 - 2⁴ = 25090627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25090603) 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, 59246 + ... + 59667.

It is an arithmetic number, because the mean of its divisors is an integer number (6302442).

Almost surely, 2^25090643 is an apocalyptic number.

25090643 is a deficient number, since it is larger than the sum of its proper divisors (119125).

25090643 is a wasteful number, since it uses less digits than its factorization.

25090643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119124.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 25090643 is about 5009.0560987076. The cubic root of 25090643 is about 292.7547365695.

Adding to 25090643 its reverse (34609052), we get a palindrome (59699695).

The spelling of 25090643 in words is "twenty-five million, ninety thousand, six hundred forty-three".