12020287 has 4 divisors (see below), whose sum is σ = 12032776. Its totient is φ = 12007800.

The previous prime is 12020249. The next prime is 12020299. The reversal of 12020287 is 78202021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4668 + ... + 6769.

It is an arithmetic number, because the mean of its divisors is an integer number (3008194).

Almost surely, 2^12020287 is an apocalyptic number.

12020287 is a deficient number, since it is larger than the sum of its proper divisors (12489).

12020287 is a wasteful number, since it uses less digits than its factorization.

12020287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12488.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 12020287 is about 3467.0285548290. The cubic root of 12020287 is about 229.0717915296.

The spelling of 12020287 in words is "twelve million, twenty thousand, two hundred eighty-seven".