12420075 has 12 divisors (see below), whose sum is σ = 20534648. Its totient is φ = 6624000.

The previous prime is 12420059. The next prime is 12420097. The reversal of 12420075 is 57002421.

It is not a de Polignac number, because 12420075 - 2⁴ = 12420059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82726 + ... + 82875.

Almost surely, 2^12420075 is an apocalyptic number.

12420075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12420075 is a deficient number, since it is larger than the sum of its proper divisors (8114573).

12420075 is a wasteful number, since it uses less digits than its factorization.

12420075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165614 (or 165609 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 12420075 is about 3524.2126780318. The cubic root of 12420075 is about 231.5837450298.

Adding to 12420075 its reverse (57002421), we get a palindrome (69422496).

The spelling of 12420075 in words is "twelve million, four hundred twenty thousand, seventy-five".