126730849 has 4 divisors (see below), whose sum is σ = 144835264. Its totient is φ = 108626436.

The previous prime is 126730831. The next prime is 126730859. The reversal of 126730849 is 948037621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126730849 - 2⁹ = 126730337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126730829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9052197 + ... + 9052210.

It is an arithmetic number, because the mean of its divisors is an integer number (36208816).

Almost surely, 2^126730849 is an apocalyptic number.

It is an amenable number.

126730849 is a deficient number, since it is larger than the sum of its proper divisors (18104415).

126730849 is an equidigital number, since it uses as much as digits as its factorization.

126730849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18104414.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 126730849 is about 11257.4796912986. The cubic root of 126730849 is about 502.2972279897.

The spelling of 126730849 in words is "one hundred twenty-six million, seven hundred thirty thousand, eight hundred forty-nine".