26486821 has 2 divisors, whose sum is σ = 26486822. Its totient is φ = 26486820.

The previous prime is 26486813. The next prime is 26486851. The reversal of 26486821 is 12868462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25300900 + 1185921 = 5030^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 26486821 - 2³ = 26486813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26486851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13243410 + 13243411.

It is an arithmetic number, because the mean of its divisors is an integer number (13243411).

Almost surely, 2^26486821 is an apocalyptic number.

It is an amenable number.

26486821 is a deficient number, since it is larger than the sum of its proper divisors (1).

26486821 is an equidigital number, since it uses as much as digits as its factorization.

26486821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 37.

The square root of 26486821 is about 5146.5348536661. The cubic root of 26486821 is about 298.0871665192.

The spelling of 26486821 in words is "twenty-six million, four hundred eighty-six thousand, eight hundred twenty-one".