2164147 has 4 divisors (see below), whose sum is σ = 2214520. Its totient is φ = 2113776.

The previous prime is 2164121. The next prime is 2164171. The reversal of 2164147 is 7414612.

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-2164147 is a prime.

It is a Duffinian number.

2164147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2164177) 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, 25122 + ... + 25207.

It is an arithmetic number, because the mean of its divisors is an integer number (553630).

2^2164147 is an apocalyptic number.

2164147 is a deficient number, since it is larger than the sum of its proper divisors (50373).

2164147 is an equidigital number, since it uses as much as digits as its factorization.

2164147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50372.

The product of its digits is 1344, while the sum is 25.

The square root of 2164147 is about 1471.1040072000. The cubic root of 2164147 is about 129.3487548184.

Adding to 2164147 its reverse (7414612), we get a palindrome (9578759).

The spelling of 2164147 in words is "two million, one hundred sixty-four thousand, one hundred forty-seven".