2642831 has 4 divisors (see below), whose sum is σ = 2649072. Its totient is φ = 2636592.

The previous prime is 2642821. The next prime is 2642839. The reversal of 2642831 is 1382462.

2642831 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: 1382462 = 2 ⋅691231.

It is a cyclic number.

It is not a de Polignac number, because 2642831 - 2¹⁴ = 2626447 is a prime.

It is a super-2 number, since 2×2642831² = 13969111389122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2642831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642839) 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 in 3 ways as a sum of consecutive naturals, for example, 2435 + ... + 3348.

It is an arithmetic number, because the mean of its divisors is an integer number (662268).

2^2642831 is an apocalyptic number.

2642831 is a deficient number, since it is larger than the sum of its proper divisors (6241).

2642831 is an equidigital number, since it uses as much as digits as its factorization.

2642831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6240.

The product of its digits is 2304, while the sum is 26.

The square root of 2642831 is about 1625.6786275276. The cubic root of 2642831 is about 138.2578494977.

The spelling of 2642831 in words is "two million, six hundred forty-two thousand, eight hundred thirty-one".