12536401 has 2 divisors, whose sum is σ = 12536402. Its totient is φ = 12536400.

The previous prime is 12536389. The next prime is 12536411. The reversal of 12536401 is 10463521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9296401 + 3240000 = 3049^2 + 1800^2 .

It is an emirp because it is prime and its reverse (10463521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12536401 - 2¹⁹ = 12012113 is a prime.

It is a super-2 number, since 2×12536401² = 314322700065602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12536411) 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, 6268200 + 6268201.

It is an arithmetic number, because the mean of its divisors is an integer number (6268201).

Almost surely, 2^12536401 is an apocalyptic number.

It is an amenable number.

12536401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12536401 is an equidigital number, since it uses as much as digits as its factorization.

12536401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12536401 is about 3540.6780424094. The cubic root of 12536401 is about 232.3045013248.

Adding to 12536401 its reverse (10463521), we get a palindrome (22999922).

The spelling of 12536401 in words is "twelve million, five hundred thirty-six thousand, four hundred one".