13212765 has 12 divisors (see below), whose sum is σ = 22902204. Its totient is φ = 7046784.

The previous prime is 13212763. The next prime is 13212767. The reversal of 13212765 is 56721231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13212763) and next prime (13212767).

It can be written as a sum of positive squares in 2 ways, for example, as 5890329 + 7322436 = 2427^2 + 2706^2 .

It is not a de Polignac number, because 13212765 - 2¹ = 13212763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212763) 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 in 11 ways as a sum of consecutive naturals, for example, 146764 + ... + 146853.

It is an arithmetic number, because the mean of its divisors is an integer number (1908517).

Almost surely, 2^13212765 is an apocalyptic number.

13212765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13212765 is a deficient number, since it is larger than the sum of its proper divisors (9689439).

13212765 is a wasteful number, since it uses less digits than its factorization.

13212765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293628 (or 293625 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 13212765 is about 3634.9367257216. The cubic root of 13212765 is about 236.4093071825.

Adding to 13212765 its reverse (56721231), we get a palindrome (69933996).

The spelling of 13212765 in words is "thirteen million, two hundred twelve thousand, seven hundred sixty-five".