1158939 has 12 divisors (see below), whose sum is σ = 1702272. Its totient is φ = 759600.

The previous prime is 1158923. The next prime is 1158953. The reversal of 1158939 is 9398511.

It is a happy number.

It is not a de Polignac number, because 1158939 - 2⁴ = 1158923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1158139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (141856).

2^1158939 is an apocalyptic number.

1158939 is a deficient number, since it is larger than the sum of its proper divisors (543333).

1158939 is a wasteful number, since it uses less digits than its factorization.

1158939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178 (or 2175 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1158939 is about 1076.5402918609. The cubic root of 1158939 is about 105.0397128691.

It can be divided in two parts, 11589 and 39, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 1158939 in words is "one million, one hundred fifty-eight thousand, nine hundred thirty-nine".