25416247 has 2 divisors, whose sum is σ = 25416248. Its totient is φ = 25416246.

The previous prime is 25416233. The next prime is 25416253. The reversal of 25416247 is 74261452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25416247 - 2¹⁹ = 24891959 is a prime.

It is a super-2 number, since 2×25416247² = 1291971223130018, which contains 22 as substring.

It is equal to p_1590259 and since 25416247 and 1590259 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25416257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12708123 + 12708124.

It is an arithmetic number, because the mean of its divisors is an integer number (12708124).

Almost surely, 2^25416247 is an apocalyptic number.

25416247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25416247 is an equidigital number, since it uses as much as digits as its factorization.

25416247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 25416247 is about 5041.4528659901. The cubic root of 25416247 is about 294.0156677907.

Adding to 25416247 its reverse (74261452), we get a palindrome (99677699).

The spelling of 25416247 in words is "twenty-five million, four hundred sixteen thousand, two hundred forty-seven".