26321251 has 18 divisors (see below), whose sum is σ = 30741620. Its totient is φ = 22457160.

The previous prime is 26321249. The next prime is 26321291. The reversal of 26321251 is 15212362.

It is not a de Polignac number, because 26321251 - 2¹ = 26321249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26321291) 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 17 ways as a sum of consecutive naturals, for example, 245940 + ... + 246046.

Almost surely, 2^26321251 is an apocalyptic number.

26321251 is a deficient number, since it is larger than the sum of its proper divisors (4420369).

26321251 is a wasteful number, since it uses less digits than its factorization.

26321251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 137 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 26321251 is about 5130.4240565474. The cubic root of 26321251 is about 297.4647501959.

Subtracting from 26321251 its reverse (15212362), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 2632 and 1251, that added together give a palindrome (3883).

The spelling of 26321251 in words is "twenty-six million, three hundred twenty-one thousand, two hundred fifty-one".