12146820 has 48 divisors (see below), whose sum is σ = 38871168. Its totient is φ = 2776320.

The previous prime is 12146819. The next prime is 12146839. The reversal of 12146820 is 2864121.

It is a super-2 number, since 2×12146820² = 295090472224800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14041 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (809816).

Almost surely, 2^12146820 is an apocalyptic number.

12146820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12146820 is an abundant number, since it is smaller than the sum of its proper divisors (26724348).

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

12146820 is a wasteful number, since it uses less digits than its factorization.

12146820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28940 (or 28938 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12146820 is about 3485.2288303639. The cubic root of 12146820 is about 229.8727714742.

The spelling of 12146820 in words is "twelve million, one hundred forty-six thousand, eight hundred twenty".