25375643 has 2 divisors, whose sum is σ = 25375644. Its totient is φ = 25375642.

The previous prime is 25375631. The next prime is 25375661. The reversal of 25375643 is 34657352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25375643 - 2⁶ = 25375579 is a prime.

It is equal to p_1587860 and since 25375643 and 1587860 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25375663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12687821 + 12687822.

It is an arithmetic number, because the mean of its divisors is an integer number (12687822).

Almost surely, 2^25375643 is an apocalyptic number.

25375643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25375643 is an equidigital number, since it uses as much as digits as its factorization.

25375643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 35.

The square root of 25375643 is about 5037.4242426065. The cubic root of 25375643 is about 293.8590150381.

The spelling of 25375643 in words is "twenty-five million, three hundred seventy-five thousand, six hundred forty-three".