1165020 has 24 divisors (see below), whose sum is σ = 3262224. Its totient is φ = 310656.

The previous prime is 1165001. The next prime is 1165037. The reversal of 1165020 is 205611.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9649 + ... + 9768.

It is an arithmetic number, because the mean of its divisors is an integer number (135926).

2^1165020 is an apocalyptic number.

1165020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165020 is an abundant number, since it is smaller than the sum of its proper divisors (2097204).

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

1165020 is a wasteful number, since it uses less digits than its factorization.

1165020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19429 (or 19427 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1165020 is about 1079.3609220275. The cubic root of 1165020 is about 105.2231083608.

The spelling of 1165020 in words is "one million, one hundred sixty-five thousand, twenty".