2864721 has 8 divisors (see below), whose sum is σ = 4044384. Its totient is φ = 1797440.

The previous prime is 2864717. The next prime is 2864723. The reversal of 2864721 is 1274682.

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 2864721 - 2² = 2864717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2864723) 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, 28035 + ... + 28136.

It is an arithmetic number, because the mean of its divisors is an integer number (505548).

2^2864721 is an apocalyptic number.

It is an amenable number.

2864721 is a deficient number, since it is larger than the sum of its proper divisors (1179663).

2864721 is a wasteful number, since it uses less digits than its factorization.

2864721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56191.

The product of its digits is 5376, while the sum is 30.

The square root of 2864721 is about 1692.5486699058. The cubic root of 2864721 is about 142.0236851320.

The spelling of 2864721 in words is "two million, eight hundred sixty-four thousand, seven hundred twenty-one".