25142171 has 2 divisors, whose sum is σ = 25142172. Its totient is φ = 25142170.

The previous prime is 25142153. The next prime is 25142177. The reversal of 25142171 is 17124152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25142171 - 2⁶ = 25142107 is a prime.

It is not a weakly prime, because it can be changed into another prime (25142177) 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, 12571085 + 12571086.

It is an arithmetic number, because the mean of its divisors is an integer number (12571086).

Almost surely, 2^25142171 is an apocalyptic number.

25142171 is a deficient number, since it is larger than the sum of its proper divisors (1).

25142171 is an equidigital number, since it uses as much as digits as its factorization.

25142171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 23.

The square root of 25142171 is about 5014.1969446762. The cubic root of 25142171 is about 292.9550071276.

The spelling of 25142171 in words is "twenty-five million, one hundred forty-two thousand, one hundred seventy-one".