1220580 has 36 divisors (see below), whose sum is σ = 3702972. Its totient is φ = 325440.

The previous prime is 1220507. The next prime is 1220591. The reversal of 1220580 is 850221.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 736164 = 696^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3211 + ... + 3570.

2^1220580 is an apocalyptic number.

1220580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220580 is an abundant number, since it is smaller than the sum of its proper divisors (2482392).

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

1220580 is a wasteful number, since it uses less digits than its factorization.

1220580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6796 (or 6791 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1220580 is about 1104.7986241845. The cubic root of 1220580 is about 106.8699033170.

The spelling of 1220580 in words is "one million, two hundred twenty thousand, five hundred eighty".