1129766545 has 4 divisors (see below), whose sum is σ = 1355719860. Its totient is φ = 903813232.

The previous prime is 1129766531. The next prime is 1129766549. The reversal of 1129766545 is 5456679211.

It is a Cunningham number, because it is equal to 33612²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5456679211 = 9433 ⋅578467.

It can be written as a sum of positive squares in 2 ways, for example, as 406748224 + 723018321 = 20168^2 + 26889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129766545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1129766495 and 1129766504.

It is not an unprimeable number, because it can be changed into a prime (1129766549) 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, 112976650 + ... + 112976659.

It is an arithmetic number, because the mean of its divisors is an integer number (338929965).

Almost surely, 2^1129766545 is an apocalyptic number.

It is an amenable number.

1129766545 is a deficient number, since it is larger than the sum of its proper divisors (225953315).

1129766545 is an equidigital number, since it uses as much as digits as its factorization.

1129766545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225953314.

The product of its digits is 453600, while the sum is 46.

The square root of 1129766545 is about 33612.0000148756. Note that the first 4 decimals coincide. The cubic root of 1129766545 is about 1041.5087031153.

It can be divided in two parts, 1129766 and 545, that added together give a palindrome (1130311).

The spelling of 1129766545 in words is "one billion, one hundred twenty-nine million, seven hundred sixty-six thousand, five hundred forty-five".