1129387 has 4 divisors (see below), whose sum is σ = 1290736. Its totient is φ = 968040.

The previous prime is 1129367. The next prime is 1129391. The reversal of 1129387 is 7839211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129387 is a prime.

It is a Duffinian number.

1129387 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1129307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80664 + ... + 80677.

It is an arithmetic number, because the mean of its divisors is an integer number (322684).

2^1129387 is an apocalyptic number.

1129387 is a deficient number, since it is larger than the sum of its proper divisors (161349).

1129387 is an equidigital number, since it uses as much as digits as its factorization.

1129387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161348.

The product of its digits is 3024, while the sum is 31.

The square root of 1129387 is about 1062.7262112134. The cubic root of 1129387 is about 104.1392058458.

The spelling of 1129387 in words is "one million, one hundred twenty-nine thousand, three hundred eighty-seven".