126543449 has 2 divisors, whose sum is σ = 126543450. Its totient is φ = 126543448.

The previous prime is 126543419. The next prime is 126543467. The reversal of 126543449 is 944345621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117332224 + 9211225 = 10832^2 + 3035^2 .

It is an emirp because it is prime and its reverse (944345621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126543449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126543419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63271724 + 63271725.

It is an arithmetic number, because the mean of its divisors is an integer number (63271725).

Almost surely, 2^126543449 is an apocalyptic number.

It is an amenable number.

126543449 is a deficient number, since it is larger than the sum of its proper divisors (1).

126543449 is an equidigital number, since it uses as much as digits as its factorization.

126543449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 126543449 is about 11249.1532570234. The cubic root of 126543449 is about 502.0495194612.

The spelling of 126543449 in words is "one hundred twenty-six million, five hundred forty-three thousand, four hundred forty-nine".