25122247 has 2 divisors, whose sum is σ = 25122248. Its totient is φ = 25122246.

The previous prime is 25122241. The next prime is 25122271. The reversal of 25122247 is 74222152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25122247 - 2³ = 25122239 is a prime.

It is a super-2 number, since 2×25122247² = 1262254588658018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25122241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561123 + 12561124.

It is an arithmetic number, because the mean of its divisors is an integer number (12561124).

Almost surely, 2^25122247 is an apocalyptic number.

25122247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25122247 is an equidigital number, since it uses as much as digits as its factorization.

25122247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 25.

The square root of 25122247 is about 5012.2097920977. The cubic root of 25122247 is about 292.8776022759.

Adding to 25122247 its reverse (74222152), we get a palindrome (99344399).

The spelling of 25122247 in words is "twenty-five million, one hundred twenty-two thousand, two hundred forty-seven".