25681395 has 16 divisors (see below), whose sum is σ = 41554080. Its totient is φ = 13542144.

The previous prime is 25681393. The next prime is 25681451. The reversal of 25681395 is 59318652.

It is not a de Polignac number, because 25681395 - 2¹ = 25681393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25681393) 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 in 15 ways as a sum of consecutive naturals, for example, 8284 + ... + 10953.

It is an arithmetic number, because the mean of its divisors is an integer number (2597130).

Almost surely, 2^25681395 is an apocalyptic number.

25681395 is a deficient number, since it is larger than the sum of its proper divisors (15872685).

25681395 is a wasteful number, since it uses less digits than its factorization.

25681395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19334.

The product of its digits is 64800, while the sum is 39.

The square root of 25681395 is about 5067.6814225048. The cubic root of 25681395 is about 295.0345454134.

The spelling of 25681395 in words is "twenty-five million, six hundred eighty-one thousand, three hundred ninety-five".