12012890 has 32 divisors (see below), whose sum is σ = 22239360. Its totient is φ = 4670784.

The previous prime is 12012887. The next prime is 12012893. The reversal of 12012890 is 9821021.

It is an interprime number because it is at equal distance from previous prime (12012887) and next prime (12012893).

It is not an unprimeable number, because it can be changed into a prime (12012893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110156 + ... + 110264.

It is an arithmetic number, because the mean of its divisors is an integer number (694980).

Almost surely, 2^12012890 is an apocalyptic number.

12012890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12012890 is a deficient number, since it is larger than the sum of its proper divisors (10226470).

12012890 is a wasteful number, since it uses less digits than its factorization.

12012890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 12012890 is about 3465.9616270236. The cubic root of 12012890 is about 229.0247934356.

The spelling of 12012890 in words is "twelve million, twelve thousand, eight hundred ninety".