1190820 has 48 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 312576.

The previous prime is 1190809. The next prime is 1190821. The reversal of 1190820 is 280911.

1190820 = T₂₃₉ + T₂₄₀ + ... + T₂₇₄.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1190821) 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, 5229 + ... + 5451.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2^1190820 is an apocalyptic number.

1190820 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 1190820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693440).

1190820 is an abundant number, since it is smaller than the sum of its proper divisors (2196060).

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

1190820 is a wasteful number, since it uses less digits than its factorization.

1190820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1190820 is about 1091.2469931230. The cubic root of 1190820 is about 105.9941850376.

Subtracting from 1190820 its reverse (280911), we obtain a palindrome (909909).

The spelling of 1190820 in words is "one million, one hundred ninety thousand, eight hundred twenty".