2861239 has 2 divisors, whose sum is σ = 2861240. Its totient is φ = 2861238.

The previous prime is 2861233. The next prime is 2861249. The reversal of 2861239 is 9321682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2861239 - 2³ = 2861231 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2861239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2861231) 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 as a sum of consecutive naturals, namely, 1430619 + 1430620.

It is an arithmetic number, because the mean of its divisors is an integer number (1430620).

2^2861239 is an apocalyptic number.

2861239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2861239 is an equidigital number, since it uses as much as digits as its factorization.

2861239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 2861239 is about 1691.5197308929. The cubic root of 2861239 is about 141.9661196694.

The spelling of 2861239 in words is "two million, eight hundred sixty-one thousand, two hundred thirty-nine".