126665973 has 12 divisors (see below), whose sum is σ = 209099488. Its totient is φ = 72380520.

The previous prime is 126665971. The next prime is 126665977. The reversal of 126665973 is 379566621.

It is not a de Polignac number, because 126665973 - 2¹ = 126665971 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126665971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1005223 + ... + 1005348.

Almost surely, 2^126665973 is an apocalyptic number.

It is an amenable number.

126665973 is a deficient number, since it is larger than the sum of its proper divisors (82433515).

126665973 is a wasteful number, since it uses less digits than its factorization.

126665973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010584 (or 2010581 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 126665973 is about 11254.5978604302. The cubic root of 126665973 is about 502.2115014350.

The spelling of 126665973 in words is "one hundred twenty-six million, six hundred sixty-five thousand, nine hundred seventy-three".