12180890 has 8 divisors (see below), whose sum is σ = 21925620. Its totient is φ = 4872352.

The previous prime is 12180877. The next prime is 12180901. The reversal of 12180890 is 9808121.

It can be written as a sum of positive squares in 2 ways, for example, as 12020089 + 160801 = 3467^2 + 401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609035 + ... + 609054.

Almost surely, 2^12180890 is an apocalyptic number.

12180890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12180890 is a deficient number, since it is larger than the sum of its proper divisors (9744730).

12180890 is a wasteful number, since it uses less digits than its factorization.

12180890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218096.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 12180890 is about 3490.1131786806. The cubic root of 12180890 is about 230.0874903446.

The spelling of 12180890 in words is "twelve million, one hundred eighty thousand, eight hundred ninety".