2742857 has 8 divisors (see below), whose sum is σ = 2984520. Its totient is φ = 2505600.

The previous prime is 2742853. The next prime is 2742863. The reversal of 2742857 is 7582472.

2742857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1157776 + 1585081 = 1076^2 + 1259^2 .

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 2742857 - 2² = 2742853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2742853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269 + ... + 2357.

It is an arithmetic number, because the mean of its divisors is an integer number (373065).

2^2742857 is an apocalyptic number.

It is an amenable number.

2742857 is a deficient number, since it is larger than the sum of its proper divisors (241663).

2742857 is a wasteful number, since it uses less digits than its factorization.

2742857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203.

The product of its digits is 31360, while the sum is 35.

The square root of 2742857 is about 1656.1572992926. The cubic root of 2742857 is about 139.9805585248.

The spelling of 2742857 in words is "two million, seven hundred forty-two thousand, eight hundred fifty-seven".