126249449 has 4 divisors (see below), whose sum is σ = 126526164. Its totient is φ = 125972736.

The previous prime is 126249427. The next prime is 126249481. The reversal of 126249449 is 944942621.

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 117505600 + 8743849 = 10840^2 + 2957^2 .

It is a cyclic number.

It is not a de Polignac number, because 126249449 - 2¹⁶ = 126183913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126249349) 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, 137672 + ... + 138585.

It is an arithmetic number, because the mean of its divisors is an integer number (31631541).

Almost surely, 2^126249449 is an apocalyptic number.

It is an amenable number.

126249449 is a deficient number, since it is larger than the sum of its proper divisors (276715).

126249449 is an equidigital number, since it uses as much as digits as its factorization.

126249449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276714.

The product of its digits is 124416, while the sum is 41.

The square root of 126249449 is about 11236.0780079172. The cubic root of 126249449 is about 501.6604119606.

The spelling of 126249449 in words is "one hundred twenty-six million, two hundred forty-nine thousand, four hundred forty-nine".