2685742 has 4 divisors (see below), whose sum is σ = 4028616. Its totient is φ = 1342870.

The previous prime is 2685731. The next prime is 2685757. The reversal of 2685742 is 2475862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2475862 = 2 ⋅1237931.

It is a junction number, because it is equal to n+sod(n) for n = 2685698 and 2685707.

It is a congruent number.

It is an unprimeable number.

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, 671434 + ... + 671437.

It is an arithmetic number, because the mean of its divisors is an integer number (1007154).

2^2685742 is an apocalyptic number.

2685742 is a deficient number, since it is larger than the sum of its proper divisors (1342874).

2685742 is a wasteful number, since it uses less digits than its factorization.

2685742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342873.

The product of its digits is 26880, while the sum is 34.

The square root of 2685742 is about 1638.8233583886. The cubic root of 2685742 is about 139.0021220110.

The spelling of 2685742 in words is "two million, six hundred eighty-five thousand, seven hundred forty-two".