26821361 has 4 divisors (see below), whose sum is σ = 30652992. Its totient is φ = 22989732.

The previous prime is 26821321. The next prime is 26821439. The reversal of 26821361 is 16312862.

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.

It is a cyclic number.

It is not a de Polignac number, because 26821361 - 2¹⁰ = 26820337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26821321) 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, 1915805 + ... + 1915818.

It is an arithmetic number, because the mean of its divisors is an integer number (7663248).

Almost surely, 2^26821361 is an apocalyptic number.

It is an amenable number.

26821361 is a deficient number, since it is larger than the sum of its proper divisors (3831631).

26821361 is an equidigital number, since it uses as much as digits as its factorization.

26821361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831630.

The product of its digits is 3456, while the sum is 29.

The square root of 26821361 is about 5178.9343498446. The cubic root of 26821361 is about 299.3369095240.

The spelling of 26821361 in words is "twenty-six million, eight hundred twenty-one thousand, three hundred sixty-one".