1129915 has 4 divisors (see below), whose sum is σ = 1355904. Its totient is φ = 903928.

The previous prime is 1129897. The next prime is 1129951. The reversal of 1129915 is 5199211.

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

It is a cyclic number.

It is not a de Polignac number, because 1129915 - 2⁷ = 1129787 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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, 112987 + ... + 112996.

It is an arithmetic number, because the mean of its divisors is an integer number (338976).

2^1129915 is an apocalyptic number.

1129915 is a deficient number, since it is larger than the sum of its proper divisors (225989).

1129915 is an equidigital number, since it uses as much as digits as its factorization.

1129915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225988.

The product of its digits is 810, while the sum is 28.

The square root of 1129915 is about 1062.9745998847. The cubic root of 1129915 is about 104.1554320328.

The spelling of 1129915 in words is "one million, one hundred twenty-nine thousand, nine hundred fifteen".