12194981 has 4 divisors (see below), whose sum is σ = 12223200. Its totient is φ = 12166764.

The previous prime is 12194977. The next prime is 12194989. The reversal of 12194981 is 18949121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18949121 = 73 ⋅259577.

It is a cyclic number.

It is not a de Polignac number, because 12194981 - 2² = 12194977 is a prime.

It is a super-2 number, since 2×12194981² = 297435123180722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12194989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13451 + ... + 14328.

It is an arithmetic number, because the mean of its divisors is an integer number (3055800).

Almost surely, 2^12194981 is an apocalyptic number.

It is an amenable number.

12194981 is a deficient number, since it is larger than the sum of its proper divisors (28219).

12194981 is an equidigital number, since it uses as much as digits as its factorization.

12194981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28218.

The product of its digits is 5184, while the sum is 35.

The square root of 12194981 is about 3492.1312976462. The cubic root of 12194981 is about 230.1761788131.

The spelling of 12194981 in words is "twelve million, one hundred ninety-four thousand, nine hundred eighty-one".