2051647 has 8 divisors (see below), whose sum is σ = 2233616. Its totient is φ = 1873152.

The previous prime is 2051641. The next prime is 2051653. The reversal of 2051647 is 7461502.

It is an interprime number because it is at equal distance from previous prime (2051641) and next prime (2051653).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051647 is a prime.

It is a Duffinian number.

2051647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (279202).

2^2051647 is an apocalyptic number.

2051647 is a deficient number, since it is larger than the sum of its proper divisors (181969).

2051647 is a wasteful number, since it uses less digits than its factorization.

2051647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2051647 is about 1432.3571482001. The cubic root of 2051647 is about 127.0674203372.

The spelling of 2051647 in words is "two million, fifty-one thousand, six hundred forty-seven".