126731137 has 4 divisors (see below), whose sum is σ = 136479700. Its totient is φ = 116982576.

The previous prime is 126731113. The next prime is 126731147. The reversal of 126731137 is 731137621.

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 14561856 + 112169281 = 3816^2 + 10591^2 .

It is a cyclic number.

It is not a de Polignac number, because 126731137 - 2¹¹ = 126729089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126731099 and 126731108.

It is not an unprimeable number, because it can be changed into a prime (126731147) 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, 4874262 + ... + 4874287.

It is an arithmetic number, because the mean of its divisors is an integer number (34119925).

Almost surely, 2^126731137 is an apocalyptic number.

It is an amenable number.

126731137 is a deficient number, since it is larger than the sum of its proper divisors (9748563).

126731137 is an equidigital number, since it uses as much as digits as its factorization.

126731137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9748562.

The product of its digits is 5292, while the sum is 31.

The square root of 126731137 is about 11257.4924827867. The cubic root of 126731137 is about 502.2976084851.

Adding to 126731137 its reverse (731137621), we get a palindrome (857868758).

The spelling of 126731137 in words is "one hundred twenty-six million, seven hundred thirty-one thousand, one hundred thirty-seven".