7161643 has 4 divisors (see below), whose sum is σ = 7173360. Its totient is φ = 7149928.

The previous prime is 7161629. The next prime is 7161653. The reversal of 7161643 is 3461617.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7161643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7161653) 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 3 ways as a sum of consecutive naturals, for example, 4888 + ... + 6181.

It is an arithmetic number, because the mean of its divisors is an integer number (1793340).

Almost surely, 2^7161643 is an apocalyptic number.

7161643 is a deficient number, since it is larger than the sum of its proper divisors (11717).

7161643 is a wasteful number, since it uses less digits than its factorization.

7161643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11716.

The product of its digits is 3024, while the sum is 28.

The square root of 7161643 is about 2676.1246234060. The cubic root of 7161643 is about 192.7543654872.

The spelling of 7161643 in words is "seven million, one hundred sixty-one thousand, six hundred forty-three".