12401165 has 20 divisors (see below), whose sum is σ = 17377404. Its totient is φ = 8495424.

The previous prime is 12401153. The next prime is 12401173. The reversal of 12401165 is 56110421.

It can be written as a sum of positive squares in 2 ways, for example, as 8934121 + 3467044 = 2989^2 + 1862^2 .

It is not a de Polignac number, because 12401165 - 2⁴ = 12401149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 19 ways as a sum of consecutive naturals, for example, 11489 + ... + 12521.

Almost surely, 2^12401165 is an apocalyptic number.

It is an amenable number.

12401165 is a deficient number, since it is larger than the sum of its proper divisors (4976239).

12401165 is an frugal number, since it uses more digits than its factorization.

12401165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 12401165 is about 3521.5287873309. The cubic root of 12401165 is about 231.4661538714.

Adding to 12401165 its reverse (56110421), we get a palindrome (68511586).

The spelling of 12401165 in words is "twelve million, four hundred one thousand, one hundred sixty-five".