25501266 has 72 divisors (see below), whose sum is σ = 66556620. Its totient is φ = 7027776.

The previous prime is 25501261. The next prime is 25501277. The reversal of 25501266 is 66210552.

It can be written as a sum of positive squares in 2 ways, for example, as 24354225 + 1147041 = 4935^2 + 1071^2 .

It is not an unprimeable number, because it can be changed into a prime (25501261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25080 + ... + 26076.

Almost surely, 2^25501266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25501266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33278310).

25501266 is an abundant number, since it is smaller than the sum of its proper divisors (41055354).

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

25501266 is a wasteful number, since it uses less digits than its factorization.

25501266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25501266 is about 5049.8778203042. The cubic root of 25501266 is about 294.3431367733.

The spelling of 25501266 in words is "twenty-five million, five hundred one thousand, two hundred sixty-six".