2856947 has 4 divisors (see below), whose sum is σ = 2899656. Its totient is φ = 2814240.

The previous prime is 2856923. The next prime is 2856961. The reversal of 2856947 is 7496582.

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 2856947 - 2⁶ = 2856883 is a prime.

It is a d-powerful number, because it can be written as 2²⁰ + 8⁴ + 5² + 6⁸ + 9⁵ + 4⁸ + 7² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2856967) 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, 21254 + ... + 21387.

It is an arithmetic number, because the mean of its divisors is an integer number (724914).

2^2856947 is an apocalyptic number.

2856947 is a deficient number, since it is larger than the sum of its proper divisors (42709).

2856947 is an equidigital number, since it uses as much as digits as its factorization.

2856947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42708.

The product of its digits is 120960, while the sum is 41.

The square root of 2856947 is about 1690.2505731400. The cubic root of 2856947 is about 141.8950987459.

The spelling of 2856947 in words is "two million, eight hundred fifty-six thousand, nine hundred forty-seven".