26621 has 4 divisors (see below), whose sum is σ = 30432. Its totient is φ = 22812.

The previous prime is 26597. The next prime is 26627. The reversal of 26621 is 12662.

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 26621 - 2⁶ = 26557 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 26621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26627) 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, 1895 + ... + 1908.

It is an arithmetic number, because the mean of its divisors is an integer number (7608).

2²⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

26621 is a deficient number, since it is larger than the sum of its proper divisors (3811).

26621 is an equidigital number, since it uses as much as digits as its factorization.

26621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810.

The product of its digits is 144, while the sum is 17.

The square root of 26621 is about 163.1594312322. The cubic root of 26621 is about 29.8589676646.

The spelling of 26621 in words is "twenty-six thousand, six hundred twenty-one".