126821363 has 2 divisors, whose sum is σ = 126821364. Its totient is φ = 126821362.

The previous prime is 126821353. The next prime is 126821381. The reversal of 126821363 is 363128621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126821363 - 2²⁴ = 110044147 is a prime.

It is a super-2 number, since 2×126821363² = 32167316226355538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126821353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63410681 + 63410682.

It is an arithmetic number, because the mean of its divisors is an integer number (63410682).

Almost surely, 2^126821363 is an apocalyptic number.

126821363 is a deficient number, since it is larger than the sum of its proper divisors (1).

126821363 is an equidigital number, since it uses as much as digits as its factorization.

126821363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 126821363 is about 11261.4991453181. The cubic root of 126821363 is about 502.4167834937.

Adding to 126821363 its reverse (363128621), we get a palindrome (489949984).

The spelling of 126821363 in words is "one hundred twenty-six million, eight hundred twenty-one thousand, three hundred sixty-three".