12001523 has 2 divisors, whose sum is σ = 12001524. Its totient is φ = 12001522.

The previous prime is 12001511. The next prime is 12001537. The reversal of 12001523 is 32510021.

It is a happy number.

It is an a-pointer prime, because the next prime (12001537) can be obtained adding 12001523 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001523 - 2⁶ = 12001459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001498 and 12001507.

It is not a weakly prime, because it can be changed into another prime (12001543) 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 as a sum of consecutive naturals, namely, 6000761 + 6000762.

It is an arithmetic number, because the mean of its divisors is an integer number (6000762).

Almost surely, 2^12001523 is an apocalyptic number.

12001523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001523 is an equidigital number, since it uses as much as digits as its factorization.

12001523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12001523 is about 3464.3214342783. The cubic root of 12001523 is about 228.9525336553.

Adding to 12001523 its reverse (32510021), we get a palindrome (44511544).

The spelling of 12001523 in words is "twelve million, one thousand, five hundred twenty-three".