26275221 has 18 divisors (see below), whose sum is σ = 44150262. Its totient is φ = 15014160.

The previous prime is 26275199. The next prime is 26275229. The reversal of 26275221 is 12257262.

It can be written as a sum of positive squares in only one way, i.e., 24354225 + 1920996 = 4935^2 + 1386^2 .

It is not a de Polignac number, because 26275221 - 2¹⁵ = 26242453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26275229) 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 17 ways as a sum of consecutive naturals, for example, 29350 + ... + 30231.

Almost surely, 2^26275221 is an apocalyptic number.

26275221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26275221 is a deficient number, since it is larger than the sum of its proper divisors (17875041).

26275221 is a wasteful number, since it uses less digits than its factorization.

26275221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59601 (or 59591 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 26275221 is about 5125.9361096291. The cubic root of 26275221 is about 297.2912491743.

The spelling of 26275221 in words is "twenty-six million, two hundred seventy-five thousand, two hundred twenty-one".