1159138 has 4 divisors (see below), whose sum is σ = 1738710. Its totient is φ = 579568.

The previous prime is 1159127. The next prime is 1159139. The reversal of 1159138 is 8319511.

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

It can be written as a sum of positive squares in only one way, i.e., 1087849 + 71289 = 1043^2 + 267^2 .

It is not an unprimeable number, because it can be changed into a prime (1159139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289783 + ... + 289786.

2^1159138 is an apocalyptic number.

1159138 is a deficient number, since it is larger than the sum of its proper divisors (579572).

1159138 is an equidigital number, since it uses as much as digits as its factorization.

1159138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579571.

The product of its digits is 1080, while the sum is 28.

The square root of 1159138 is about 1076.6327136029. The cubic root of 1159138 is about 105.0457246053.

It can be divided in two parts, 115913 and 8, that added together give a triangular number (115921 = T₄₈₁).

The spelling of 1159138 in words is "one million, one hundred fifty-nine thousand, one hundred thirty-eight".