12320401 has 2 divisors, whose sum is σ = 12320402. Its totient is φ = 12320400.

The previous prime is 12320369. The next prime is 12320411. The reversal of 12320401 is 10402321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7568001 + 4752400 = 2751^2 + 2180^2 .

It is an emirp because it is prime and its reverse (10402321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12320401 - 2⁵ = 12320369 is a prime.

It is not a weakly prime, because it can be changed into another prime (12320411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160200 + 6160201.

It is an arithmetic number, because the mean of its divisors is an integer number (6160201).

Almost surely, 2^12320401 is an apocalyptic number.

It is an amenable number.

12320401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320401 is an equidigital number, since it uses as much as digits as its factorization.

12320401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12320401 is about 3510.0428772310. The cubic root of 12320401 is about 230.9625758479.

Adding to 12320401 its reverse (10402321), we get a palindrome (22722722).

It can be divided in two parts, 12320 and 401, that added together give a palindrome (12721).

The spelling of 12320401 in words is "twelve million, three hundred twenty thousand, four hundred one".