25247 has 2 divisors, whose sum is σ = 25248. Its totient is φ = 25246.

The previous prime is 25243. The next prime is 25253. The reversal of 25247 is 74252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25247 - 2² = 25243 is a prime.

It is a super-2 number, since 2×25247² = 1274822018, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 13 and base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12623 + 12624.

It is an arithmetic number, because the mean of its divisors is an integer number (12624).

2²⁵²⁴⁷ is an apocalyptic number.

25247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25247 is an equidigital number, since it uses as much as digits as its factorization.

25247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 20.

The square root of 25247 is about 158.8930457887. The cubic root of 25247 is about 29.3361596221.

Adding to 25247 its reverse (74252), we get a palindrome (99499).

It can be divided in two parts, 25 and 247, that added together give a palindrome (272).

The spelling of 25247 in words is "twenty-five thousand, two hundred forty-seven".