1165540 has 24 divisors (see below), whose sum is σ = 2476152. Its totient is φ = 460800.

The previous prime is 1165531. The next prime is 1165579. The reversal of 1165540 is 455611.

It can be written as a sum of positive squares in 4 ways, for example, as 788544 + 376996 = 888^2 + 614^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732 + ... + 2308.

It is an arithmetic number, because the mean of its divisors is an integer number (103173).

2^1165540 is an apocalyptic number.

1165540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165540 is an abundant number, since it is smaller than the sum of its proper divisors (1310612).

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

1165540 is a wasteful number, since it uses less digits than its factorization.

1165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1165540 is about 1079.6017784350. The cubic root of 1165540 is about 105.2387612759.

The spelling of 1165540 in words is "one million, one hundred sixty-five thousand, five hundred forty".