12145992 has 16 divisors (see below), whose sum is σ = 30365040. Its totient is φ = 4048656.

The previous prime is 12145981. The next prime is 12145993. The reversal of 12145992 is 29954121.

It is not an unprimeable number, because it can be changed into a prime (12145993) 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, 253018 + ... + 253065.

It is an arithmetic number, because the mean of its divisors is an integer number (1897815).

Almost surely, 2^12145992 is an apocalyptic number.

12145992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12145992 is an abundant number, since it is smaller than the sum of its proper divisors (18219048).

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

12145992 is a wasteful number, since it uses less digits than its factorization.

12145992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506092 (or 506088 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 12145992 is about 3485.1100413043. The cubic root of 12145992 is about 229.8675481873.

The spelling of 12145992 in words is "twelve million, one hundred forty-five thousand, nine hundred ninety-two".