2147 has 4 divisors (see below), whose sum is σ = 2280. Its totient is φ = 2016.

The previous prime is 2143. The next prime is 2153. The reversal of 2147 is 7412.

Adding to 2147 its reverse (7412), we get a palindrome (9559).

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2147 - 2^{2} = 2143 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 12.

It is a nialpdrome in base 13, base 15 and base 16.

It is an inconsummate number, since it does not exist a number *n* which divided by its sum of digits gives 2147.

It is not an unprimeable number, because it can be changed into a prime (2141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 75.

It is an arithmetic number, because the mean of its divisors is an integer number (570).

2147 is the 38-th pentagonal number.

2147 is a deficient number, since it is larger than the sum of its proper divisors (133).

2147 is a wasteful number, since it uses less digits than its factorization.

2147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132.

The product of its digits is 56, while the sum is 14.

The square root of 2147 is about 46.3357313528. The cubic root of 2147 is about 12.9006229293.

The spelling of 2147 in words is "two thousand, one hundred forty-seven", and thus it is an iban number.

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