26581225 has 24 divisors (see below), whose sum is σ = 36238752. Its totient is φ = 19180800.

The previous prime is 26581213. The next prime is 26581237. The reversal of 26581225 is 52218562.

It is an interprime number because it is at equal distance from previous prime (26581213) and next prime (26581237).

It is not a de Polignac number, because 26581225 - 2⁷ = 26581097 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 44529 + ... + 45121.

It is an arithmetic number, because the mean of its divisors is an integer number (1509948).

Almost surely, 2^26581225 is an apocalyptic number.

26581225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26581225 is a deficient number, since it is larger than the sum of its proper divisors (9657527).

26581225 is a wasteful number, since it uses less digits than its factorization.

26581225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 772 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 26581225 is about 5155.6983038188. The cubic root of 26581225 is about 298.4408928006.

Adding to 26581225 its reverse (52218562), we get a palindrome (78799787).

It can be divided in two parts, 2658 and 1225, that added together give a palindrome (3883).

The spelling of 26581225 in words is "twenty-six million, five hundred eighty-one thousand, two hundred twenty-five".