126873509 has 8 divisors (see below), whose sum is σ = 145067328. Its totient is φ = 108696960.

The previous prime is 126873491. The next prime is 126873511. The reversal of 126873509 is 905378621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126873509 - 2¹⁶ = 126807973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126873559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22814 + ... + 27824.

It is an arithmetic number, because the mean of its divisors is an integer number (18133416).

Almost surely, 2^126873509 is an apocalyptic number.

It is an amenable number.

126873509 is a deficient number, since it is larger than the sum of its proper divisors (18193819).

126873509 is an equidigital number, since it uses as much as digits as its factorization.

126873509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8635.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 126873509 is about 11263.8141408672. The cubic root of 126873509 is about 502.4856347634.

The spelling of 126873509 in words is "one hundred twenty-six million, eight hundred seventy-three thousand, five hundred nine".