1165140 has 36 divisors (see below), whose sum is σ = 3534804. Its totient is φ = 310656.

The previous prime is 1165139. The next prime is 1165147. The reversal of 1165140 is 415611.

1165140 is a `hidden beast` number, since 11 + 651 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 311364 + 853776 = 558^2 + 924^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165147) 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, 3057 + ... + 3416.

It is an arithmetic number, because the mean of its divisors is an integer number (98189).

2^1165140 is an apocalyptic number.

1165140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165140 is an abundant number, since it is smaller than the sum of its proper divisors (2369664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165140 is a wasteful number, since it uses less digits than its factorization.

1165140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6488 (or 6483 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1165140 is about 1079.4165090455. The cubic root of 1165140 is about 105.2267209853.

The spelling of 1165140 in words is "one million, one hundred sixty-five thousand, one hundred forty".