25641443 has 2 divisors, whose sum is σ = 25641444. Its totient is φ = 25641442.

The previous prime is 25641419. The next prime is 25641449. The reversal of 25641443 is 34414652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25641443 is a prime.

It is not a weakly prime, because it can be changed into another prime (25641449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12820721 + 12820722.

It is an arithmetic number, because the mean of its divisors is an integer number (12820722).

Almost surely, 2^25641443 is an apocalyptic number.

25641443 is a deficient number, since it is larger than the sum of its proper divisors (1).

25641443 is an equidigital number, since it uses as much as digits as its factorization.

25641443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 29.

The square root of 25641443 is about 5063.7380461473. The cubic root of 25641443 is about 294.8814730197.

The spelling of 25641443 in words is "twenty-five million, six hundred forty-one thousand, four hundred forty-three".