1165870 has 32 divisors (see below), whose sum is σ = 2265408. Its totient is φ = 430848.

The previous prime is 1165861. The next prime is 1165873. The reversal of 1165870 is 785611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8442 + ... + 8578.

It is an arithmetic number, because the mean of its divisors is an integer number (70794).

2^1165870 is an apocalyptic number.

1165870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1165870 is a deficient number, since it is larger than the sum of its proper divisors (1099538).

1165870 is a wasteful number, since it uses less digits than its factorization.

1165870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1165870 is about 1079.7546017499. The cubic root of 1165870 is about 105.2486924420.

The spelling of 1165870 in words is "one million, one hundred sixty-five thousand, eight hundred seventy".