25378571 has 2 divisors, whose sum is σ = 25378572. Its totient is φ = 25378570.

The previous prime is 25378541. The next prime is 25378583. The reversal of 25378571 is 17587352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25378571 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25378541) 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, 12689285 + 12689286.

It is an arithmetic number, because the mean of its divisors is an integer number (12689286).

Almost surely, 2^25378571 is an apocalyptic number.

25378571 is a deficient number, since it is larger than the sum of its proper divisors (1).

25378571 is an equidigital number, since it uses as much as digits as its factorization.

25378571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 38.

The square root of 25378571 is about 5037.7148589415. The cubic root of 25378571 is about 293.8703170322.

The spelling of 25378571 in words is "twenty-five million, three hundred seventy-eight thousand, five hundred seventy-one".