12132978 has 64 divisors (see below), whose sum is σ = 29030400. Its totient is φ = 3332160.

The previous prime is 12132971. The next prime is 12133013. The reversal of 12132978 is 87923121.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12132971) 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 31 ways as a sum of consecutive naturals, for example, 67693 + ... + 67871.

It is an arithmetic number, because the mean of its divisors is an integer number (453600).

Almost surely, 2^12132978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12132978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14515200).

12132978 is an abundant number, since it is smaller than the sum of its proper divisors (16897422).

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

12132978 is a wasteful number, since it uses less digits than its factorization.

12132978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its digits is 6048, while the sum is 33.

The square root of 12132978 is about 3483.2424549549. The cubic root of 12132978 is about 229.7854205374.

The spelling of 12132978 in words is "twelve million, one hundred thirty-two thousand, nine hundred seventy-eight".