12162890 has 16 divisors (see below), whose sum is σ = 22648680. Its totient is φ = 4697280.

The previous prime is 12162859. The next prime is 12162893. The reversal of 12162890 is 9826121.

It can be written as a sum of positive squares in 4 ways, for example, as 6165289 + 5997601 = 2483^2 + 2449^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (12162893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20681 + ... + 21260.

Almost surely, 2^12162890 is an apocalyptic number.

12162890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12162890 is a deficient number, since it is larger than the sum of its proper divisors (10485790).

12162890 is a wasteful number, since it uses less digits than its factorization.

12162890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41977.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12162890 is about 3487.5335123838. The cubic root of 12162890 is about 229.9740991628.

The spelling of 12162890 in words is "twelve million, one hundred sixty-two thousand, eight hundred ninety".