2851439 has 4 divisors (see below), whose sum is σ = 2866560. Its totient is φ = 2836320.

The previous prime is 2851423. The next prime is 2851441. The reversal of 2851439 is 9341582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9341582 = 2 ⋅4670791.

It is a cyclic number.

It is not a de Polignac number, because 2851439 - 2⁴ = 2851423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7274 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (716640).

2^2851439 is an apocalyptic number.

2851439 is a deficient number, since it is larger than the sum of its proper divisors (15121).

2851439 is a wasteful number, since it uses less digits than its factorization.

2851439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15120.

The product of its digits is 8640, while the sum is 32.

The square root of 2851439 is about 1688.6204428468. The cubic root of 2851439 is about 141.8038520402.

The spelling of 2851439 in words is "two million, eight hundred fifty-one thousand, four hundred thirty-nine".