25715243 has 2 divisors, whose sum is σ = 25715244. Its totient is φ = 25715242.

The previous prime is 25715231. The next prime is 25715267. The reversal of 25715243 is 34251752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25715243 - 2¹⁰ = 25714219 is a prime.

It is a super-2 number, since 2×25715243² = 1322547445098098, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25715273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12857621 + 12857622.

It is an arithmetic number, because the mean of its divisors is an integer number (12857622).

Almost surely, 2^25715243 is an apocalyptic number.

25715243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25715243 is an equidigital number, since it uses as much as digits as its factorization.

25715243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 25715243 is about 5071.0199171370. The cubic root of 25715243 is about 295.1641067189.

Adding to 25715243 its reverse (34251752), we get a palindrome (59966995).

The spelling of 25715243 in words is "twenty-five million, seven hundred fifteen thousand, two hundred forty-three".