25742243 has 2 divisors, whose sum is σ = 25742244. Its totient is φ = 25742242.

The previous prime is 25742239. The next prime is 25742261. The reversal of 25742243 is 34224752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25742243 - 2² = 25742239 is a prime.

It is not a weakly prime, because it can be changed into another prime (25742273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12871121 + 12871122.

It is an arithmetic number, because the mean of its divisors is an integer number (12871122).

Almost surely, 2^25742243 is an apocalyptic number.

25742243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25742243 is an equidigital number, since it uses as much as digits as its factorization.

25742243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 29.

The square root of 25742243 is about 5073.6814050549. The cubic root of 25742243 is about 295.2673741766.

Adding to 25742243 its reverse (34224752), we get a palindrome (59966995).

The spelling of 25742243 in words is "twenty-five million, seven hundred forty-two thousand, two hundred forty-three".