26247281 has 4 divisors (see below), whose sum is σ = 26275392. Its totient is φ = 26219172.

The previous prime is 26247251. The next prime is 26247289. The reversal of 26247281 is 18274262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18274262 = 2 ⋅9137131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26247281 is a prime.

It is a super-2 number, since 2×26247281² = 1377839519785922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26247289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12605 + ... + 14538.

It is an arithmetic number, because the mean of its divisors is an integer number (6568848).

Almost surely, 2^26247281 is an apocalyptic number.

It is an amenable number.

26247281 is a deficient number, since it is larger than the sum of its proper divisors (28111).

26247281 is an equidigital number, since it uses as much as digits as its factorization.

26247281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28110.

The product of its digits is 10752, while the sum is 32.

The square root of 26247281 is about 5123.2100288784. The cubic root of 26247281 is about 297.1858359989.

The spelling of 26247281 in words is "twenty-six million, two hundred forty-seven thousand, two hundred eighty-one".