126244421 has 2 divisors, whose sum is σ = 126244422. Its totient is φ = 126244420.

The previous prime is 126244409. The next prime is 126244427. The reversal of 126244421 is 124442621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120143521 + 6100900 = 10961^2 + 2470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126244421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126244427) 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, 63122210 + 63122211.

It is an arithmetic number, because the mean of its divisors is an integer number (63122211).

Almost surely, 2^126244421 is an apocalyptic number.

It is an amenable number.

126244421 is a deficient number, since it is larger than the sum of its proper divisors (1).

126244421 is an equidigital number, since it uses as much as digits as its factorization.

126244421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 26.

The square root of 126244421 is about 11235.8542621378. The cubic root of 126244421 is about 501.6537521770.

The spelling of 126244421 in words is "one hundred twenty-six million, two hundred forty-four thousand, four hundred twenty-one".