2858721 has 8 divisors (see below), whose sum is σ = 4012320. Its totient is φ = 1805472.

The previous prime is 2858711. The next prime is 2858741. The reversal of 2858721 is 1278582.

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

It is not a de Polignac number, because 2858721 - 2⁹ = 2858209 is a prime.

2858721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2858701) 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, 25020 + ... + 25133.

It is an arithmetic number, because the mean of its divisors is an integer number (501540).

2^2858721 is an apocalyptic number.

It is an amenable number.

2858721 is a deficient number, since it is larger than the sum of its proper divisors (1153599).

2858721 is a wasteful number, since it uses less digits than its factorization.

2858721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50175.

The product of its digits is 8960, while the sum is 33.

The square root of 2858721 is about 1690.7752659653. The cubic root of 2858721 is about 141.9244622379.

The spelling of 2858721 in words is "two million, eight hundred fifty-eight thousand, seven hundred twenty-one".