126209073 has 16 divisors (see below), whose sum is σ = 181653120. Its totient is φ = 77704704.

The previous prime is 126209063. The next prime is 126209099. The reversal of 126209073 is 370902621.

It is not a de Polignac number, because 126209073 - 2⁶ = 126209009 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 126209073.

It is not an unprimeable number, because it can be changed into a prime (126209023) 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 in 15 ways as a sum of consecutive naturals, for example, 29536 + ... + 33537.

It is an arithmetic number, because the mean of its divisors is an integer number (11353320).

Almost surely, 2^126209073 is an apocalyptic number.

It is an amenable number.

126209073 is a deficient number, since it is larger than the sum of its proper divisors (55444047).

126209073 is a wasteful number, since it uses less digits than its factorization.

126209073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63128.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 126209073 is about 11234.2811519029. The cubic root of 126209073 is about 501.6069273696.

The spelling of 126209073 in words is "one hundred twenty-six million, two hundred nine thousand, seventy-three".