12194890 has 8 divisors (see below), whose sum is σ = 21950820. Its totient is φ = 4877952.

The previous prime is 12194881. The next prime is 12194909. The reversal of 12194890 is 9849121.

It can be written as a sum of positive squares in 2 ways, for example, as 12159169 + 35721 = 3487^2 + 189^2 .

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

It is a super-2 number, since 2×12194890² = 297430684224200, which contains 22 as substring.

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, 609735 + ... + 609754.

Almost surely, 2^12194890 is an apocalyptic number.

12194890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12194890 is a deficient number, since it is larger than the sum of its proper divisors (9755930).

12194890 is a wasteful number, since it uses less digits than its factorization.

12194890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219496.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 12194890 is about 3492.1182683294. The cubic root of 12194890 is about 230.1756062802.

The spelling of 12194890 in words is "twelve million, one hundred ninety-four thousand, eight hundred ninety".