1129971 has 4 divisors (see below), whose sum is σ = 1506632. Its totient is φ = 753312.

The previous prime is 1129963. The next prime is 1129991. The reversal of 1129971 is 1799211.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1129971 - 2³ = 1129963 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188326 + ... + 188331.

It is an arithmetic number, because the mean of its divisors is an integer number (376658).

2^1129971 is an apocalyptic number.

1129971 is a deficient number, since it is larger than the sum of its proper divisors (376661).

1129971 is an equidigital number, since it uses as much as digits as its factorization.

1129971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376660.

The product of its digits is 1134, while the sum is 30.

The square root of 1129971 is about 1063.0009407334. Note that the first 3 decimals coincide. The cubic root of 1129971 is about 104.1571526955.

The spelling of 1129971 in words is "one million, one hundred twenty-nine thousand, nine hundred seventy-one".