26861247 has 16 divisors (see below), whose sum is σ = 45479680. Its totient is φ = 15349176.

The previous prime is 26861203. The next prime is 26861251. The reversal of 26861247 is 74216862.

It is not a de Polignac number, because 26861247 - 2⁷ = 26861119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26861257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70873 + ... + 71250.

It is an arithmetic number, because the mean of its divisors is an integer number (2842480).

Almost surely, 2^26861247 is an apocalyptic number.

26861247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

26861247 is a deficient number, since it is larger than the sum of its proper divisors (18618433).

26861247 is a wasteful number, since it uses less digits than its factorization.

26861247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142139 (or 142133 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 26861247 is about 5182.7837114817. The cubic root of 26861247 is about 299.4852171674.

The spelling of 26861247 in words is "twenty-six million, eight hundred sixty-one thousand, two hundred forty-seven".