2871257 has 2 divisors, whose sum is σ = 2871258. Its totient is φ = 2871256.

The previous prime is 2871233. The next prime is 2871287. The reversal of 2871257 is 7521782.

2871257 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1713481 + 1157776 = 1309^2 + 1076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2871257 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2871227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1435628 + 1435629.

It is an arithmetic number, because the mean of its divisors is an integer number (1435629).

2^2871257 is an apocalyptic number.

It is an amenable number.

2871257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2871257 is an equidigital number, since it uses as much as digits as its factorization.

2871257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 32.

The square root of 2871257 is about 1694.4783858167. The cubic root of 2871257 is about 142.1316144019.

The spelling of 2871257 in words is "two million, eight hundred seventy-one thousand, two hundred fifty-seven".