12189454 has 12 divisors (see below), whose sum is σ = 18939024. Its totient is φ = 5883752.

The previous prime is 12189449. The next prime is 12189461. The reversal of 12189454 is 45498121.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a pancake number, because a pancake can be divided into 12189454 parts by 4937 straight cuts.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1942 + ... + 5305.

It is an arithmetic number, because the mean of its divisors is an integer number (1578252).

Almost surely, 2^12189454 is an apocalyptic number.

12189454 is a deficient number, since it is larger than the sum of its proper divisors (6749570).

12189454 is an equidigital number, since it uses as much as digits as its factorization.

12189454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7307 (or 7278 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 12189454 is about 3491.3398574186. The cubic root of 12189454 is about 230.1414001343.

The spelling of 12189454 in words is "twelve million, one hundred eighty-nine thousand, four hundred fifty-four".