25742447 has 2 divisors, whose sum is σ = 25742448. Its totient is φ = 25742446.

The previous prime is 25742443. The next prime is 25742461. The reversal of 25742447 is 74424752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25742447 - 2² = 25742443 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 (25742443) 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, 12871223 + 12871224.

It is an arithmetic number, because the mean of its divisors is an integer number (12871224).

Almost surely, 2^25742447 is an apocalyptic number.

25742447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25742447 is an equidigital number, since it uses as much as digits as its factorization.

25742447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 35.

The square root of 25742447 is about 5073.7015087606. The cubic root of 25742447 is about 295.2681541447.

The spelling of 25742447 in words is "twenty-five million, seven hundred forty-two thousand, four hundred forty-seven".