2851642 has 4 divisors (see below), whose sum is σ = 4277466. Its totient is φ = 1425820.

The previous prime is 2851633. The next prime is 2851643. The reversal of 2851642 is 2461582.

2851642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2461582 = 2 ⋅1230791.

It can be written as a sum of positive squares in only one way, i.e., 1687401 + 1164241 = 1299^2 + 1079^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2851642.

It is not an unprimeable number, because it can be changed into a prime (2851643) 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 as a sum of consecutive naturals, namely, 712909 + ... + 712912.

2^2851642 is an apocalyptic number.

2851642 is a deficient number, since it is larger than the sum of its proper divisors (1425824).

2851642 is a wasteful number, since it uses less digits than its factorization.

2851642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425823.

The product of its digits is 3840, while the sum is 28.

The square root of 2851642 is about 1688.6805500153. The cubic root of 2851642 is about 141.8072170661.

The spelling of 2851642 in words is "two million, eight hundred fifty-one thousand, six hundred forty-two".