1161613 has 4 divisors (see below), whose sum is σ = 1172380. Its totient is φ = 1150848.

The previous prime is 1161599. The next prime is 1161617. The reversal of 1161613 is 3161611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 381924 + 779689 = 618^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161613 - 2⁵ = 1161581 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 (1161617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5220 + ... + 5437.

It is an arithmetic number, because the mean of its divisors is an integer number (293095).

2^1161613 is an apocalyptic number.

It is an amenable number.

1161613 is a deficient number, since it is larger than the sum of its proper divisors (10767).

1161613 is a wasteful number, since it uses less digits than its factorization.

1161613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766.

The product of its digits is 108, while the sum is 19.

The square root of 1161613 is about 1077.7815177484. The cubic root of 1161613 is about 105.1204362574.

The spelling of 1161613 in words is "one million, one hundred sixty-one thousand, six hundred thirteen".