1129779 has 24 divisors (see below), whose sum is σ = 1896960. Its totient is φ = 634608.

The previous prime is 1129763. The next prime is 1129787. The reversal of 1129779 is 9779211.

It is not a de Polignac number, because 1129779 - 2⁴ = 1129763 is a prime.

1129779 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129729) 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 23 ways as a sum of consecutive naturals, for example, 4864 + ... + 5090.

It is an arithmetic number, because the mean of its divisors is an integer number (79040).

2^1129779 is an apocalyptic number.

1129779 is a deficient number, since it is larger than the sum of its proper divisors (767181).

1129779 is a wasteful number, since it uses less digits than its factorization.

1129779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 316 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 1129779 is about 1062.9106265345. The cubic root of 1129779 is about 104.1512530438.

The spelling of 1129779 in words is "one million, one hundred twenty-nine thousand, seven hundred seventy-nine".