126213473 has 2 divisors, whose sum is σ = 126213474. Its totient is φ = 126213472.

The previous prime is 126213469. The next prime is 126213487. The reversal of 126213473 is 374312621.

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., 70442449 + 55771024 = 8393^2 + 7468^2 .

It is a cyclic number.

It is not a de Polignac number, because 126213473 - 2² = 126213469 is a prime.

It is not a weakly prime, because it can be changed into another prime (126213413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63106736 + 63106737.

It is an arithmetic number, because the mean of its divisors is an integer number (63106737).

Almost surely, 2^126213473 is an apocalyptic number.

It is an amenable number.

126213473 is a deficient number, since it is larger than the sum of its proper divisors (1).

126213473 is an equidigital number, since it uses as much as digits as its factorization.

126213473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

The square root of 126213473 is about 11234.4769793702. The cubic root of 126213473 is about 501.6127564403.

The spelling of 126213473 in words is "one hundred twenty-six million, two hundred thirteen thousand, four hundred seventy-three".