26021 has 2 divisors, whose sum is σ = 26022. Its totient is φ = 26020.

The previous prime is 26017. The next prime is 26029. The reversal of 26021 is 12062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25921 + 100 = 161^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 26021 - 2² = 26017 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25993 and 26011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13010 + 13011.

It is an arithmetic number, because the mean of its divisors is an integer number (13011).

2²⁶⁰²¹ is an apocalyptic number.

It is an amenable number.

26021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26021 is an equidigital number, since it uses as much as digits as its factorization.

26021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 26021 is about 161.3102600581. The cubic root of 26021 is about 29.6329344886.

Adding to 26021 its reverse (12062), we get a palindrome (38083).

It can be divided in two parts, 260 and 21, that multiplied together give a triangular number (5460 = T₁₀₄).

The spelling of 26021 in words is "twenty-six thousand, twenty-one".