126130621 has 2 divisors, whose sum is σ = 126130622. Its totient is φ = 126130620.

The previous prime is 126130601. The next prime is 126130651. The reversal of 126130621 is 126031621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 51998521 = 8610^2 + 7211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126130621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126130592 and 126130601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126130601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63065310 + 63065311.

It is an arithmetic number, because the mean of its divisors is an integer number (63065311).

Almost surely, 2^126130621 is an apocalyptic number.

It is an amenable number.

126130621 is a deficient number, since it is larger than the sum of its proper divisors (1).

126130621 is an equidigital number, since it uses as much as digits as its factorization.

126130621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 126130621 is about 11230.7889749563. The cubic root of 126130621 is about 501.5029722885.

The spelling of 126130621 in words is "one hundred twenty-six million, one hundred thirty thousand, six hundred twenty-one".