426121261 has 2 divisors, whose sum is σ = 426121262. Its totient is φ = 426121260.

The previous prime is 426121249. The next prime is 426121277. The reversal of 426121261 is 162121624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423124900 + 2996361 = 20570^2 + 1731^2 .

It is a cyclic number.

It is not a de Polignac number, because 426121261 - 2⁵ = 426121229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213060630 + 213060631.

It is an arithmetic number, because the mean of its divisors is an integer number (213060631).

Almost surely, 2^426121261 is an apocalyptic number.

It is an amenable number.

426121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

426121261 is an equidigital number, since it uses as much as digits as its factorization.

426121261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 426121261 is about 20642.7047888594. The cubic root of 426121261 is about 752.5079073351.

Adding to 426121261 its reverse (162121624), we get a palindrome (588242885).

The spelling of 426121261 in words is "four hundred twenty-six million, one hundred twenty-one thousand, two hundred sixty-one".