2042731 has 4 divisors (see below), whose sum is σ = 2113200. Its totient is φ = 1972264.

The previous prime is 2042717. The next prime is 2042749. The reversal of 2042731 is 1372402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1372402 = 2 ⋅686201.

It is a cyclic number.

It is not a de Polignac number, because 2042731 - 2⁷ = 2042603 is a prime.

It is a super-2 number, since 2×2042731² = 8345499876722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2042699 and 2042708.

It is not an unprimeable number, because it can be changed into a prime (2042531) 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, 35191 + ... + 35248.

It is an arithmetic number, because the mean of its divisors is an integer number (528300).

2^2042731 is an apocalyptic number.

2042731 is a deficient number, since it is larger than the sum of its proper divisors (70469).

2042731 is an equidigital number, since it uses as much as digits as its factorization.

2042731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70468.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 2042731 is about 1429.2414071807. The cubic root of 2042731 is about 126.8830841670.

The spelling of 2042731 in words is "two million, forty-two thousand, seven hundred thirty-one".