126044021 has 2 divisors, whose sum is σ = 126044022. Its totient is φ = 126044020.

The previous prime is 126043987. The next prime is 126044027. The reversal of 126044021 is 120440621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83923921 + 42120100 = 9161^2 + 6490^2 .

It is a cyclic number.

It is not a de Polignac number, because 126044021 - 2¹⁴ = 126027637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126043984 and 126044002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126044027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63022010 + 63022011.

It is an arithmetic number, because the mean of its divisors is an integer number (63022011).

Almost surely, 2^126044021 is an apocalyptic number.

It is an amenable number.

126044021 is a deficient number, since it is larger than the sum of its proper divisors (1).

126044021 is an equidigital number, since it uses as much as digits as its factorization.

126044021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 126044021 is about 11226.9328402730. The cubic root of 126044021 is about 501.3881703992.

Adding to 126044021 its reverse (120440621), we get a palindrome (246484642).

The spelling of 126044021 in words is "one hundred twenty-six million, forty-four thousand, twenty-one".