12121652 has 24 divisors (see below), whose sum is σ = 22226400. Its totient is φ = 5776736.

The previous prime is 12121631. The next prime is 12121661. The reversal of 12121652 is 25612121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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, 8999 + ... + 10257.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^12121652 is an apocalyptic number.

It is an amenable number.

12121652 is a deficient number, since it is larger than the sum of its proper divisors (10104748).

12121652 is a wasteful number, since it uses less digits than its factorization.

12121652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375 (or 1373 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 12121652 is about 3481.6162913222. The cubic root of 12121652 is about 229.7138975661.

Adding to 12121652 its reverse (25612121), we get a palindrome (37733773).

The spelling of 12121652 in words is "twelve million, one hundred twenty-one thousand, six hundred fifty-two".