126009449 has 8 divisors (see below), whose sum is σ = 127801800. Its totient is φ = 124230016.

The previous prime is 126009439. The next prime is 126009467. The reversal of 126009449 is 944900621.

It can be written as a sum of positive squares in 4 ways, for example, as 2088025 + 123921424 = 1445^2 + 11132^2 .

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 126009449 - 2¹² = 126005353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126009419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17327 + ... + 23499.

It is an arithmetic number, because the mean of its divisors is an integer number (15975225).

Almost surely, 2^126009449 is an apocalyptic number.

It is an amenable number.

126009449 is a deficient number, since it is larger than the sum of its proper divisors (1792351).

126009449 is a wasteful number, since it uses less digits than its factorization.

126009449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6459.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 126009449 is about 11225.3930443437. The cubic root of 126009449 is about 501.3423251018.

The spelling of 126009449 in words is "one hundred twenty-six million, nine thousand, four hundred forty-nine".