12212523 has 6 divisors (see below), whose sum is σ = 17640324. Its totient is φ = 8141676.

The previous prime is 12212521. The next prime is 12212539. The reversal of 12212523 is 32521221.

It is not a de Polignac number, because 12212523 - 2¹ = 12212521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212496 and 12212505.

It is not an unprimeable number, because it can be changed into a prime (12212521) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 678465 + ... + 678482.

It is an arithmetic number, because the mean of its divisors is an integer number (2940054).

Almost surely, 2^12212523 is an apocalyptic number.

12212523 is a deficient number, since it is larger than the sum of its proper divisors (5427801).

12212523 is a wasteful number, since it uses less digits than its factorization.

12212523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356953 (or 1356950 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 12212523 is about 3494.6420417548. The cubic root of 12212523 is about 230.2864923928.

Adding to 12212523 its reverse (32521221), we get a palindrome (44733744).

The spelling of 12212523 in words is "twelve million, two hundred twelve thousand, five hundred twenty-three".