12021425 has 24 divisors (see below), whose sum is σ = 16415616. Its totient is φ = 8677440.

The previous prime is 12021403. The next prime is 12021473. The reversal of 12021425 is 52412021.

It is a de Polignac number, because none of the positive numbers 2^k-12021425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14882 + ... + 15668.

It is an arithmetic number, because the mean of its divisors is an integer number (683984).

Almost surely, 2^12021425 is an apocalyptic number.

It is an amenable number.

12021425 is a deficient number, since it is larger than the sum of its proper divisors (4394191).

12021425 is a wasteful number, since it uses less digits than its factorization.

12021425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12021425 is about 3467.1926684279. The cubic root of 12021425 is about 229.0790202941.

Adding to 12021425 its reverse (52412021), we get a palindrome (64433446).

The spelling of 12021425 in words is "twelve million, twenty-one thousand, four hundred twenty-five".