126926729 has 4 divisors (see below), whose sum is σ = 127147284. Its totient is φ = 126706176.

The previous prime is 126926713. The next prime is 126926749. The reversal of 126926729 is 927629621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126607504 + 319225 = 11252^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 126926729 - 2⁴ = 126926713 is a prime.

It is a super-2 number, since 2×126926729² = 32220789069278882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126926729.

It is not an unprimeable number, because it can be changed into a prime (126926749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109412 + ... + 110565.

It is an arithmetic number, because the mean of its divisors is an integer number (31786821).

Almost surely, 2^126926729 is an apocalyptic number.

It is an amenable number.

126926729 is a deficient number, since it is larger than the sum of its proper divisors (220555).

126926729 is an equidigital number, since it uses as much as digits as its factorization.

126926729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220554.

The product of its digits is 163296, while the sum is 44.

The square root of 126926729 is about 11266.1763256218. The cubic root of 126926729 is about 502.5558846454. Note that the first 3 decimals are identical.

The spelling of 126926729 in words is "one hundred twenty-six million, nine hundred twenty-six thousand, seven hundred twenty-nine".