12171790 has 8 divisors (see below), whose sum is σ = 21909240. Its totient is φ = 4868712.

The previous prime is 12171787. The next prime is 12171811. The reversal of 12171790 is 9717121.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 608580 + ... + 608599.

It is an arithmetic number, because the mean of its divisors is an integer number (2738655).

Almost surely, 2^12171790 is an apocalyptic number.

12171790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12171790 is a deficient number, since it is larger than the sum of its proper divisors (9737450).

12171790 is a wasteful number, since it uses less digits than its factorization.

12171790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217186.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 12171790 is about 3488.8092524528. The cubic root of 12171790 is about 230.0301787747.

The spelling of 12171790 in words is "twelve million, one hundred seventy-one thousand, seven hundred ninety".