12021975 has 72 divisors (see below), whose sum is σ = 26114400. Its totient is φ = 5160960.

The previous prime is 12021973. The next prime is 12021991. The reversal of 12021975 is 57912021.

It is not a de Polignac number, because 12021975 - 2¹ = 12021973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021973) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 26551 + ... + 26999.

It is an arithmetic number, because the mean of its divisors is an integer number (362700).

Almost surely, 2^12021975 is an apocalyptic number.

12021975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12021975 is an abundant number, since it is smaller than the sum of its proper divisors (14092425).

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

12021975 is a wasteful number, since it uses less digits than its factorization.

12021975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12021975 is about 3467.2719824092. The cubic root of 12021975 is about 229.0825138217.

Adding to 12021975 its reverse (57912021), we get a palindrome (69933996).

It can be divided in two parts, 12021 and 975, that added together give a square (12996 = 114²).

The spelling of 12021975 in words is "twelve million, twenty-one thousand, nine hundred seventy-five".