2161147 has 4 divisors (see below), whose sum is σ = 2174256. Its totient is φ = 2148040.

The previous prime is 2161141. The next prime is 2161157. The reversal of 2161147 is 7411612.

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-2161147 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2161141) 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, 6304 + ... + 6637.

It is an arithmetic number, because the mean of its divisors is an integer number (543564).

2^2161147 is an apocalyptic number.

2161147 is a deficient number, since it is larger than the sum of its proper divisors (13109).

2161147 is a wasteful number, since it uses less digits than its factorization.

2161147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13108.

The product of its digits is 336, while the sum is 22.

The square root of 2161147 is about 1470.0840112048. The cubic root of 2161147 is about 129.2889582474.

Adding to 2161147 its reverse (7411612), we get a palindrome (9572759).

The spelling of 2161147 in words is "two million, one hundred sixty-one thousand, one hundred forty-seven".