126674509 has 4 divisors (see below), whose sum is σ = 136418716. Its totient is φ = 116930304.

The previous prime is 126674489. The next prime is 126674533. The reversal of 126674509 is 905476621.

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 34456900 + 92217609 = 5870^2 + 9603^2 .

It is a cyclic number.

It is not a de Polignac number, because 126674509 - 2⁵ = 126674477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126674549) 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, 4872084 + ... + 4872109.

It is an arithmetic number, because the mean of its divisors is an integer number (34104679).

Almost surely, 2^126674509 is an apocalyptic number.

It is an amenable number.

126674509 is a deficient number, since it is larger than the sum of its proper divisors (9744207).

126674509 is an equidigital number, since it uses as much as digits as its factorization.

126674509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9744206.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 126674509 is about 11254.9770768314. The cubic root of 126674509 is about 502.2227824996. Note that the first 3 decimals are identical.

The spelling of 126674509 in words is "one hundred twenty-six million, six hundred seventy-four thousand, five hundred nine".