25621423 has 2 divisors, whose sum is σ = 25621424. Its totient is φ = 25621422.

The previous prime is 25621417. The next prime is 25621441. The reversal of 25621423 is 32412652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25621423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25621493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810711 + 12810712.

It is an arithmetic number, because the mean of its divisors is an integer number (12810712).

Almost surely, 2^25621423 is an apocalyptic number.

25621423 is a deficient number, since it is larger than the sum of its proper divisors (1).

25621423 is an equidigital number, since it uses as much as digits as its factorization.

25621423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 25621423 is about 5061.7608596219. The cubic root of 25621423 is about 294.8047084348.

The spelling of 25621423 in words is "twenty-five million, six hundred twenty-one thousand, four hundred twenty-three".