1126749749 has 4 divisors (see below), whose sum is σ = 1193029164. Its totient is φ = 1060470336.

The previous prime is 1126749739. The next prime is 1126749751. The reversal of 1126749749 is 9479476211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9479476211 = 1373 ⋅6904207.

It can be written as a sum of positive squares in 2 ways, for example, as 470109124 + 656640625 = 21682^2 + 25625^2 .

It is not a de Polignac number, because 1126749749 - 2²⁰ = 1125701173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1126749697 and 1126749706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1126749709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33139682 + ... + 33139715.

It is an arithmetic number, because the mean of its divisors is an integer number (298257291).

Almost surely, 2^1126749749 is an apocalyptic number.

It is an amenable number.

1126749749 is a deficient number, since it is larger than the sum of its proper divisors (66279415).

1126749749 is an equidigital number, since it uses as much as digits as its factorization.

1126749749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66279414.

The product of its digits is 762048, while the sum is 50.

The square root of 1126749749 is about 33567.0932462136. The cubic root of 1126749749 is about 1040.5808358631.

It can be divided in two parts, 11267 and 49749, that added together give a palindrome (61016).

The spelling of 1126749749 in words is "one billion, one hundred twenty-six million, seven hundred forty-nine thousand, seven hundred forty-nine".