25861901 has 12 divisors (see below), whose sum is σ = 28233972. Its totient is φ = 23677056.

The previous prime is 25861873. The next prime is 25861909. The reversal of 25861901 is 10916852.

It can be written as a sum of positive squares in 6 ways, for example, as 9060100 + 16801801 = 3010^2 + 4099^2 .

It is not a de Polignac number, because 25861901 - 2⁶ = 25861837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25861909) 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 in 11 ways as a sum of consecutive naturals, for example, 22595 + ... + 23711.

It is an arithmetic number, because the mean of its divisors is an integer number (2352831).

Almost surely, 2^25861901 is an apocalyptic number.

It is an amenable number.

25861901 is a deficient number, since it is larger than the sum of its proper divisors (2372071).

25861901 is a wasteful number, since it uses less digits than its factorization.

25861901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 25861901 is about 5085.4597628926. The cubic root of 25861901 is about 295.7241655170.

It can be divided in two parts, 25861 and 901, that added together give a palindrome (26762).

The spelling of 25861901 in words is "twenty-five million, eight hundred sixty-one thousand, nine hundred one".