12128994 has 16 divisors (see below), whose sum is σ = 26953440. Its totient is φ = 4042980.

The previous prime is 12128969. The next prime is 12129017. The reversal of 12128994 is 49982121.

It is a super-2 number, since 2×12128994² = 294224990904072, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 112252 + ... + 112359.

It is an arithmetic number, because the mean of its divisors is an integer number (1684590).

Almost surely, 2^12128994 is an apocalyptic number.

12128994 is an abundant number, since it is smaller than the sum of its proper divisors (14824446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12128994 is a wasteful number, since it uses less digits than its factorization.

12128994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224622 (or 224616 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 12128994 is about 3482.6705270525. The cubic root of 12128994 is about 229.7602669069.

It can be divided in two parts, 1212899 and 4, that added together give a triangular number (1212903 = T₁₅₅₇).

The spelling of 12128994 in words is "twelve million, one hundred twenty-eight thousand, nine hundred ninety-four".