826242121 has 2 divisors, whose sum is σ = 826242122. Its totient is φ = 826242120.

The previous prime is 826242107. The next prime is 826242223. The reversal of 826242121 is 121242628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 531948096 + 294294025 = 23064^2 + 17155^2 .

It is a cyclic number.

It is not a de Polignac number, because 826242121 - 2¹⁷ = 826111049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 826242121.

It is not a weakly prime, because it can be changed into another prime (826242421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413121060 + 413121061.

It is an arithmetic number, because the mean of its divisors is an integer number (413121061).

Almost surely, 2^826242121 is an apocalyptic number.

It is an amenable number.

826242121 is a deficient number, since it is larger than the sum of its proper divisors (1).

826242121 is an equidigital number, since it uses as much as digits as its factorization.

826242121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 826242121 is about 28744.4276512857. The cubic root of 826242121 is about 938.3591871227.

Adding to 826242121 its reverse (121242628), we get a palindrome (947484749).

The spelling of 826242121 in words is "eight hundred twenty-six million, two hundred forty-two thousand, one hundred twenty-one".