1165613 has 4 divisors (see below), whose sum is σ = 1172928. Its totient is φ = 1158300.

The previous prime is 1165583. The next prime is 1165643. The reversal of 1165613 is 3165611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3165611 = 29 ⋅109159.

It is an interprime number because it is at equal distance from previous prime (1165583) and next prime (1165643).

It is a cyclic number.

It is not a de Polignac number, because 1165613 - 2⁸ = 1165357 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 (1165643) 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, 3413 + ... + 3738.

It is an arithmetic number, because the mean of its divisors is an integer number (293232).

2^1165613 is an apocalyptic number.

It is an amenable number.

1165613 is a deficient number, since it is larger than the sum of its proper divisors (7315).

1165613 is an equidigital number, since it uses as much as digits as its factorization.

1165613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314.

The product of its digits is 540, while the sum is 23.

The square root of 1165613 is about 1079.6355866680. The cubic root of 1165613 is about 105.2409583317.

The spelling of 1165613 in words is "one million, one hundred sixty-five thousand, six hundred thirteen".