1165620 has 24 divisors (see below), whose sum is σ = 3263904. Its totient is φ = 310816.

The previous prime is 1165583. The next prime is 1165643. The reversal of 1165620 is 265611.

It is a happy number.

It is a congruent number.

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, 9654 + ... + 9773.

It is an arithmetic number, because the mean of its divisors is an integer number (135996).

2^1165620 is an apocalyptic number.

1165620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165620 is an abundant number, since it is smaller than the sum of its proper divisors (2098284).

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

1165620 is a wasteful number, since it uses less digits than its factorization.

1165620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19439 (or 19437 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1165620 is about 1079.6388284978. The cubic root of 1165620 is about 105.2411690035.

Subtracting from 1165620 its reverse (265611), we obtain a palindrome (900009).

The spelling of 1165620 in words is "one million, one hundred sixty-five thousand, six hundred twenty".