25440671 has 2 divisors, whose sum is σ = 25440672. Its totient is φ = 25440670.

The previous prime is 25440661. The next prime is 25440697. The reversal of 25440671 is 17604452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25440671 - 2²² = 21246367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25440661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720335 + 12720336.

It is an arithmetic number, because the mean of its divisors is an integer number (12720336).

Almost surely, 2^25440671 is an apocalyptic number.

25440671 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440671 is an equidigital number, since it uses as much as digits as its factorization.

25440671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 25440671 is about 5043.8746019305. The cubic root of 25440671 is about 294.1098167508.

The spelling of 25440671 in words is "twenty-five million, four hundred forty thousand, six hundred seventy-one".