2051220 has 48 divisors (see below), whose sum is σ = 6084288. Its totient is φ = 514560.

The previous prime is 2051219. The next prime is 2051233. The reversal of 2051220 is 221502.

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 = 2051196 and 2051205.

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 15 ways as a sum of consecutive naturals, for example, 15 + ... + 2025.

It is an arithmetic number, because the mean of its divisors is an integer number (126756).

2^2051220 is an apocalyptic number.

2051220 is a gapful number since it is divisible by the number (20) 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 2051220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3042144).

2051220 is an abundant number, since it is smaller than the sum of its proper divisors (4033068).

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

2051220 is a wasteful number, since it uses less digits than its factorization.

2051220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2051220 is about 1432.2080854401. The cubic root of 2051220 is about 127.0586044033.

Adding to 2051220 its reverse (221502), we get a palindrome (2272722).

The spelling of 2051220 in words is "two million, fifty-one thousand, two hundred twenty".