126642473 has 2 divisors, whose sum is σ = 126642474. Its totient is φ = 126642472.

The previous prime is 126642457. The next prime is 126642499. The reversal of 126642473 is 374246621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126607504 + 34969 = 11252^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 126642473 - 2⁴ = 126642457 is a prime.

It is not a weakly prime, because it can be changed into another prime (126642433) 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, 63321236 + 63321237.

It is an arithmetic number, because the mean of its divisors is an integer number (63321237).

Almost surely, 2^126642473 is an apocalyptic number.

It is an amenable number.

126642473 is a deficient number, since it is larger than the sum of its proper divisors (1).

126642473 is an equidigital number, since it uses as much as digits as its factorization.

126642473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 35.

The square root of 126642473 is about 11253.5537942465. The cubic root of 126642473 is about 502.1804415275.

The spelling of 126642473 in words is "one hundred twenty-six million, six hundred forty-two thousand, four hundred seventy-three".