126117137 has 4 divisors (see below), whose sum is σ = 126139956. Its totient is φ = 126094320.

The previous prime is 126117133. The next prime is 126117139. The reversal of 126117137 is 731711621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731711621 = 9241 ⋅79181.

It can be written as a sum of positive squares in 2 ways, for example, as 52432081 + 73685056 = 7241^2 + 8584^2 .

It is a cyclic number.

It is not a de Polignac number, because 126117137 - 2² = 126117133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126117133) 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, 2687 + ... + 16107.

It is an arithmetic number, because the mean of its divisors is an integer number (31534989).

Almost surely, 2^126117137 is an apocalyptic number.

It is an amenable number.

126117137 is a deficient number, since it is larger than the sum of its proper divisors (22819).

126117137 is an equidigital number, since it uses as much as digits as its factorization.

126117137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22818.

The product of its digits is 1764, while the sum is 29.

The square root of 126117137 is about 11230.1886448982. The cubic root of 126117137 is about 501.4851005853.

Adding to 126117137 its reverse (731711621), we get a palindrome (857828758).

The spelling of 126117137 in words is "one hundred twenty-six million, one hundred seventeen thousand, one hundred thirty-seven".