1180020 has 48 divisors (see below), whose sum is σ = 3362688. Its totient is φ = 309120.

The previous prime is 1180019. The next prime is 1180027. The reversal of 1180020 is 200811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1179978 and 1180005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1180027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4122 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (70056).

2^1180020 is an apocalyptic number.

1180020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1180020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681344).

1180020 is an abundant number, since it is smaller than the sum of its proper divisors (2182668).

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

1180020 is a wasteful number, since it uses less digits than its factorization.

1180020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1180020 is about 1086.2872548272. The cubic root of 1180020 is about 105.6727775405.

Adding to 1180020 its reverse (200811), we get a palindrome (1380831).

The spelling of 1180020 in words is "one million, one hundred eighty thousand, twenty".