2145647 has 8 divisors (see below), whose sum is σ = 2558976. Its totient is φ = 1759032.

The previous prime is 2145643. The next prime is 2145677. The reversal of 2145647 is 7465412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145647 - 2² = 2145643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145641) 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 7 ways as a sum of consecutive naturals, for example, 6503 + ... + 6824.

It is an arithmetic number, because the mean of its divisors is an integer number (319872).

2^2145647 is an apocalyptic number.

2145647 is a deficient number, since it is larger than the sum of its proper divisors (413329).

2145647 is a wasteful number, since it uses less digits than its factorization.

2145647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357.

The product of its digits is 6720, while the sum is 29.

The square root of 2145647 is about 1464.8027170920. The cubic root of 2145647 is about 128.9791244789.

The spelling of 2145647 in words is "two million, one hundred forty-five thousand, six hundred forty-seven".