25861122 has 72 divisors (see below), whose sum is σ = 66023100. Its totient is φ = 7293888.

The previous prime is 25861093. The next prime is 25861123. The reversal of 25861122 is 22116852.

It is a happy number.

25861122 is a `hidden beast` number, since 25 + 8 + 611 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25190361 + 670761 = 5019^2 + 819^2 .

It is not an unprimeable number, because it can be changed into a prime (25861123) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 96004 + ... + 96272.

Almost surely, 2^25861122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25861122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33011550).

25861122 is an abundant number, since it is smaller than the sum of its proper divisors (40161978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25861122 is a wasteful number, since it uses less digits than its factorization.

25861122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 390 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 25861122 is about 5085.3831714041. The cubic root of 25861122 is about 295.7211962658.

Adding to 25861122 its reverse (22116852), we get a palindrome (47977974).

The spelling of 25861122 in words is "twenty-five million, eight hundred sixty-one thousand, one hundred twenty-two".