12021580 has 12 divisors (see below), whose sum is σ = 25245360. Its totient is φ = 4808624.

The previous prime is 12021577. The next prime is 12021593. The reversal of 12021580 is 8512021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300520 + ... + 300559.

It is an arithmetic number, because the mean of its divisors is an integer number (2103780).

Almost surely, 2^12021580 is an apocalyptic number.

12021580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021580 is an abundant number, since it is smaller than the sum of its proper divisors (13223780).

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

12021580 is a wasteful number, since it uses less digits than its factorization.

12021580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601088 (or 601086 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 12021580 is about 3467.2150207335. The cubic root of 12021580 is about 229.0800048445.

It can be divided in two parts, 120215 and 80, that added together give a triangular number (120295 = T₄₉₀).

The spelling of 12021580 in words is "twelve million, twenty-one thousand, five hundred eighty".