12020581 has 8 divisors (see below), whose sum is σ = 12821760. Its totient is φ = 11229888.

The previous prime is 12020573. The next prime is 12020609. The reversal of 12020581 is 18502021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12020581 - 2³ = 12020573 is a prime.

It is a super-2 number, since 2×12020581² = 288988735155122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (1602720).

Almost surely, 2^12020581 is an apocalyptic number.

It is an amenable number.

12020581 is a deficient number, since it is larger than the sum of its proper divisors (801179).

12020581 is a wasteful number, since it uses less digits than its factorization.

12020581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243.

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

The square root of 12020581 is about 3467.0709539898. The cubic root of 12020581 is about 229.0736591100.

The spelling of 12020581 in words is "twelve million, twenty thousand, five hundred eighty-one".