12321571 has 2 divisors, whose sum is σ = 12321572. Its totient is φ = 12321570.

The previous prime is 12321563. The next prime is 12321577. The reversal of 12321571 is 17512321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12321571 - 2³ = 12321563 is a prime.

It is a super-2 number, since 2×12321571² = 303642223816082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12321577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160785 + 6160786.

It is an arithmetic number, because the mean of its divisors is an integer number (6160786).

Almost surely, 2^12321571 is an apocalyptic number.

12321571 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321571 is an equidigital number, since it uses as much as digits as its factorization.

12321571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 22.

The square root of 12321571 is about 3510.2095379051. The cubic root of 12321571 is about 230.9698866938.

Adding to 12321571 its reverse (17512321), we get a palindrome (29833892).

The spelling of 12321571 in words is "twelve million, three hundred twenty-one thousand, five hundred seventy-one".