126916049 has 4 divisors (see below), whose sum is σ = 136678836. Its totient is φ = 117153264.

The previous prime is 126916043. The next prime is 126916057. The reversal of 126916049 is 940619621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940619621 = 16979 ⋅55399.

It can be written as a sum of positive squares in 2 ways, for example, as 38837824 + 88078225 = 6232^2 + 9385^2 .

It is a cyclic number.

It is not a de Polignac number, because 126916049 - 2⁸ = 126915793 is a prime.

It is a super-2 number, since 2×126916049² = 32215366987540802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126916043) 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, 4881374 + ... + 4881399.

It is an arithmetic number, because the mean of its divisors is an integer number (34169709).

Almost surely, 2^126916049 is an apocalyptic number.

It is an amenable number.

126916049 is a deficient number, since it is larger than the sum of its proper divisors (9762787).

126916049 is an equidigital number, since it uses as much as digits as its factorization.

126916049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9762786.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 126916049 is about 11265.7023305252. The cubic root of 126916049 is about 502.5417887245.

The spelling of 126916049 in words is "one hundred twenty-six million, nine hundred sixteen thousand, forty-nine".