1129923 has 8 divisors (see below), whose sum is σ = 1674000. Its totient is φ = 753264.

The previous prime is 1129897. The next prime is 1129951. The reversal of 1129923 is 3299211.

It is not a de Polignac number, because 1129923 - 2⁶ = 1129859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 41849 = 1129923 / (1 + 1 + 2 + 9 + 9 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (1129963) 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 7 ways as a sum of consecutive naturals, for example, 20898 + ... + 20951.

It is an arithmetic number, because the mean of its divisors is an integer number (209250).

2^1129923 is an apocalyptic number.

1129923 is a deficient number, since it is larger than the sum of its proper divisors (544077).

1129923 is an equidigital number, since it uses as much as digits as its factorization.

1129923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41858 (or 41852 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1129923 is about 1062.9783629030. The cubic root of 1129923 is about 104.1556778452.

The spelling of 1129923 in words is "one million, one hundred twenty-nine thousand, nine hundred twenty-three".