1165138 has 16 divisors (see below), whose sum is σ = 1929816. Its totient is φ = 524160.

The previous prime is 1165127. The next prime is 1165139. The reversal of 1165138 is 8315611.

It can be written as a sum of positive squares in 4 ways, for example, as 859329 + 305809 = 927^2 + 553^2 .

It is not an unprimeable number, because it can be changed into a prime (1165139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520 + ... + 1612.

2^1165138 is an apocalyptic number.

1165138 is a deficient number, since it is larger than the sum of its proper divisors (764678).

1165138 is a wasteful number, since it uses less digits than its factorization.

1165138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149.

The product of its digits is 720, while the sum is 25.

The square root of 1165138 is about 1079.4155826187. The cubic root of 1165138 is about 105.2266607769.

The spelling of 1165138 in words is "one million, one hundred sixty-five thousand, one hundred thirty-eight".