126956549 has 4 divisors (see below), whose sum is σ = 127007820. Its totient is φ = 126905280.

The previous prime is 126956539. The next prime is 126956567. The reversal of 126956549 is 945659621.

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 49252324 + 77704225 = 7018^2 + 8815^2 .

It is a cyclic number.

It is not a de Polignac number, because 126956549 - 2¹⁶ = 126891013 is a prime.

It is a super-2 number, since 2×126956549² = 32235930667978802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126956539) 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 3 ways as a sum of consecutive naturals, for example, 21722 + ... + 26939.

It is an arithmetic number, because the mean of its divisors is an integer number (31751955).

Almost surely, 2^126956549 is an apocalyptic number.

It is an amenable number.

126956549 is a deficient number, since it is larger than the sum of its proper divisors (51271).

126956549 is an equidigital number, since it uses as much as digits as its factorization.

126956549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51270.

The product of its digits is 583200, while the sum is 47.

The square root of 126956549 is about 11267.4996782782. The cubic root of 126956549 is about 502.5952381715.

The spelling of 126956549 in words is "one hundred twenty-six million, nine hundred fifty-six thousand, five hundred forty-nine".