12156890 has 16 divisors (see below), whose sum is σ = 21924000. Its totient is φ = 4853520.

The previous prime is 12156847. The next prime is 12156899. The reversal of 12156890 is 9865121.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12156899) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7361 + ... + 8859.

It is an arithmetic number, because the mean of its divisors is an integer number (1370250).

Almost surely, 2^12156890 is an apocalyptic number.

12156890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12156890 is a deficient number, since it is larger than the sum of its proper divisors (9767110).

12156890 is a wasteful number, since it uses less digits than its factorization.

12156890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12156890 is about 3486.6731994840. The cubic root of 12156890 is about 229.9362772429.

The spelling of 12156890 in words is "twelve million, one hundred fifty-six thousand, eight hundred ninety".