1965220 has 24 divisors (see below), whose sum is σ = 4173624. Its totient is φ = 777216.

The previous prime is 1965203. The next prime is 1965239. The reversal of 1965220 is 225691.

It can be written as a sum of positive squares in 4 ways, for example, as 10816 + 1954404 = 104^2 + 1398^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434 + ... + 2446.

It is an arithmetic number, because the mean of its divisors is an integer number (173901).

2^1965220 is an apocalyptic number.

1965220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1965220 is an abundant number, since it is smaller than the sum of its proper divisors (2208404).

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

1965220 is a wasteful number, since it uses less digits than its factorization.

1965220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1965220 is about 1401.8630460926. The cubic root of 1965220 is about 125.2574958695.

The spelling of 1965220 in words is "one million, nine hundred sixty-five thousand, two hundred twenty".