1129491 has 16 divisors (see below), whose sum is σ = 1825920. Its totient is φ = 684360.

The previous prime is 1129489. The next prime is 1129501. The reversal of 1129491 is 1949211.

It is not a de Polignac number, because 1129491 - 2¹ = 1129489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1129441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1605 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (114120).

2^1129491 is an apocalyptic number.

1129491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1129491 is a deficient number, since it is larger than the sum of its proper divisors (696429).

1129491 is a wasteful number, since it uses less digits than its factorization.

1129491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823 (or 3817 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 1129491 is about 1062.7751408459. The cubic root of 1129491 is about 104.1424023128.

The spelling of 1129491 in words is "one million, one hundred twenty-nine thousand, four hundred ninety-one".