2947865 has 8 divisors (see below), whose sum is σ = 3619968. Its totient is φ = 2303280.

The previous prime is 2947853. The next prime is 2947877. The reversal of 2947865 is 5687492.

It is an interprime number because it is at equal distance from previous prime (2947853) and next prime (2947877).

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

It is not a de Polignac number, because 2947865 - 2⁶ = 2947801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 6641 + ... + 7070.

It is an arithmetic number, because the mean of its divisors is an integer number (452496).

2^2947865 is an apocalyptic number.

It is an amenable number.

2947865 is a deficient number, since it is larger than the sum of its proper divisors (672103).

2947865 is a wasteful number, since it uses less digits than its factorization.

2947865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13759.

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

The square root of 2947865 is about 1716.9347687085. The cubic root of 2947865 is about 143.3846069790.

The spelling of 2947865 in words is "two million, nine hundred forty-seven thousand, eight hundred sixty-five".