25749247 has 2 divisors, whose sum is σ = 25749248. Its totient is φ = 25749246.

The previous prime is 25749209. The next prime is 25749253. The reversal of 25749247 is 74294752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25749247 - 2¹⁹ = 25224959 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 (25749257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12874623 + 12874624.

It is an arithmetic number, because the mean of its divisors is an integer number (12874624).

Almost surely, 2^25749247 is an apocalyptic number.

25749247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25749247 is an equidigital number, since it uses as much as digits as its factorization.

25749247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 25749247 is about 5074.3715867090. The cubic root of 25749247 is about 295.2941507239.

The spelling of 25749247 in words is "twenty-five million, seven hundred forty-nine thousand, two hundred forty-seven".