12121575 has 24 divisors (see below), whose sum is σ = 20915328. Its totient is φ = 6182880.

The previous prime is 12121547. The next prime is 12121579. The reversal of 12121575 is 57512121.

12121575 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12121575 - 2⁶ = 12121511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1789 + ... + 5238.

It is an arithmetic number, because the mean of its divisors is an integer number (871472).

Almost surely, 2^12121575 is an apocalyptic number.

12121575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12121575 is a deficient number, since it is larger than the sum of its proper divisors (8793753).

12121575 is a wasteful number, since it uses less digits than its factorization.

12121575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7063 (or 7058 counting only the distinct ones).

The product of its digits is 700, while the sum is 24.

The square root of 12121575 is about 3481.6052332222. The cubic root of 12121575 is about 229.7134111636.

Adding to 12121575 its reverse (57512121), we get a palindrome (69633696).

The spelling of 12121575 in words is "twelve million, one hundred twenty-one thousand, five hundred seventy-five".