1156939 has 8 divisors (see below), whose sum is σ = 1349600. Its totient is φ = 991368.

The previous prime is 1156927. The next prime is 1156949. The reversal of 1156939 is 9396511.

It is not a de Polignac number, because 1156939 - 2⁵ = 1156907 is a prime.

1156939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1156949) 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, 1344 + ... + 2029.

It is an arithmetic number, because the mean of its divisors is an integer number (168700).

2^1156939 is an apocalyptic number.

1156939 is a deficient number, since it is larger than the sum of its proper divisors (192661).

1156939 is an frugal number, since it uses more digits than its factorization.

1156939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394 (or 3380 counting only the distinct ones).

The product of its digits is 7290, while the sum is 34.

The square root of 1156939 is about 1075.6109891592. The cubic root of 1156939 is about 104.9792551610.

The spelling of 1156939 in words is "one million, one hundred fifty-six thousand, nine hundred thirty-nine".