12985801 has 2 divisors, whose sum is σ = 12985802. Its totient is φ = 12985800.

The previous prime is 12985799. The next prime is 12985867. The reversal of 12985801 is 10858921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12787776 + 198025 = 3576^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 12985801 - 2¹ = 12985799 is a prime.

It is a super-2 number, since 2×12985801² = 337262055223202, which contains 22 as substring.

Together with 12985799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12985891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6492900 + 6492901.

It is an arithmetic number, because the mean of its divisors is an integer number (6492901).

Almost surely, 2^12985801 is an apocalyptic number.

It is an amenable number.

12985801 is a deficient number, since it is larger than the sum of its proper divisors (1).

12985801 is an equidigital number, since it uses as much as digits as its factorization.

12985801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 12985801 is about 3603.5816904852. The cubic root of 12985801 is about 235.0478309159.

The spelling of 12985801 in words is "twelve million, nine hundred eighty-five thousand, eight hundred one".