12020655 has 16 divisors (see below), whose sum is σ = 19505664. Its totient is φ = 6320160.

The previous prime is 12020647. The next prime is 12020681. The reversal of 12020655 is 55602021.

It is not a de Polignac number, because 12020655 - 2³ = 12020647 is a prime.

It is a super-2 number, since 2×12020655² = 288992293258050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4579 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (1219104).

Almost surely, 2^12020655 is an apocalyptic number.

12020655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12020655 is a deficient number, since it is larger than the sum of its proper divisors (7485009).

12020655 is a wasteful number, since it uses less digits than its factorization.

12020655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11366.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12020655 is about 3467.0816258058. The cubic root of 12020655 is about 229.0741291765.

Adding to 12020655 its reverse (55602021), we get a palindrome (67622676).

The spelling of 12020655 in words is "twelve million, twenty thousand, six hundred fifty-five".