12021040 has 40 divisors (see below), whose sum is σ = 29596320. Its totient is φ = 4525056.

The previous prime is 12021029. The next prime is 12021043. The reversal of 12021040 is 4012021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (12021043) 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 7 ways as a sum of consecutive naturals, for example, 3060 + ... + 5779.

It is an arithmetic number, because the mean of its divisors is an integer number (739908).

Almost surely, 2^12021040 is an apocalyptic number.

12021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021040 is an abundant number, since it is smaller than the sum of its proper divisors (17575280).

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

12021040 is a wasteful number, since it uses less digits than its factorization.

12021040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8869 (or 8863 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12021040 is about 3467.1371475614. The cubic root of 12021040 is about 229.0765747614.

Adding to 12021040 its reverse (4012021), we get a palindrome (16033061).

The spelling of 12021040 in words is "twelve million, twenty-one thousand, forty".