1365613 has 4 divisors (see below), whose sum is σ = 1371708. Its totient is φ = 1359520.

The previous prime is 1365583. The next prime is 1365659. The reversal of 1365613 is 3165631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3165631 = 7 ⋅452233.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 927369 = 662^2 + 963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1365613 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 (1365313) 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, 2698 + ... + 3163.

It is an arithmetic number, because the mean of its divisors is an integer number (342927).

2^1365613 is an apocalyptic number.

It is an amenable number.

1365613 is a deficient number, since it is larger than the sum of its proper divisors (6095).

1365613 is an equidigital number, since it uses as much as digits as its factorization.

1365613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6094.

The product of its digits is 1620, while the sum is 25.

The square root of 1365613 is about 1168.5944548901. The cubic root of 1365613 is about 110.9453779898.

The spelling of 1365613 in words is "one million, three hundred sixty-five thousand, six hundred thirteen".