12998365 has 4 divisors (see below), whose sum is σ = 15598044. Its totient is φ = 10398688.

The previous prime is 12998347. The next prime is 12998369. The reversal of 12998365 is 56389921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56389921 = 7 ⋅8055703.

It can be written as a sum of positive squares in 2 ways, for example, as 7112889 + 5885476 = 2667^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 12998365 - 2¹¹ = 12996317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12998369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299832 + ... + 1299841.

It is an arithmetic number, because the mean of its divisors is an integer number (3899511).

Almost surely, 2^12998365 is an apocalyptic number.

It is an amenable number.

12998365 is a deficient number, since it is larger than the sum of its proper divisors (2599679).

12998365 is an equidigital number, since it uses as much as digits as its factorization.

12998365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599678.

The product of its digits is 116640, while the sum is 43.

The square root of 12998365 is about 3605.3245346293. The cubic root of 12998365 is about 235.1236108403.

The spelling of 12998365 in words is "twelve million, nine hundred ninety-eight thousand, three hundred sixty-five".