12020775 has 24 divisors (see below), whose sum is σ = 21404880. Its totient is φ = 5917440.

The previous prime is 12020759. The next prime is 12020851. The reversal of 12020775 is 57702021.

It is not a de Polignac number, because 12020775 - 2⁴ = 12020759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5190 + ... + 7139.

It is an arithmetic number, because the mean of its divisors is an integer number (891870).

Almost surely, 2^12020775 is an apocalyptic number.

12020775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12020775 is a deficient number, since it is larger than the sum of its proper divisors (9384105).

12020775 is a wasteful number, since it uses less digits than its factorization.

12020775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355 (or 12350 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 12020775 is about 3467.0989313834. The cubic root of 12020775 is about 229.0748914423.

Adding to 12020775 its reverse (57702021), we get a palindrome (69722796).

The spelling of 12020775 in words is "twelve million, twenty thousand, seven hundred seventy-five".