12147100 has 108 divisors (see below), whose sum is σ = 31961496. Its totient is φ = 3991680.

The previous prime is 12147067. The next prime is 12147101. The reversal of 12147100 is 174121.

It is a super-3 number, since 3×12147100³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 181267 + ... + 181333.

Almost surely, 2^12147100 is an apocalyptic number.

12147100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12147100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15980748).

12147100 is an abundant number, since it is smaller than the sum of its proper divisors (19814396).

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

12147100 is a wasteful number, since it uses less digits than its factorization.

12147100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12147100 is about 3485.2689996613. The cubic root of 12147100 is about 229.8745377495.

The spelling of 12147100 in words is "twelve million, one hundred forty-seven thousand, one hundred".