2071643 has 4 divisors (see below), whose sum is σ = 2367600. Its totient is φ = 1775688.

The previous prime is 2071631. The next prime is 2071649. The reversal of 2071643 is 3461702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3461702 = 2 ⋅1730851.

It is a cyclic number.

It is not a de Polignac number, because 2071643 - 2⁶ = 2071579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2071649) 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, 147968 + ... + 147981.

It is an arithmetic number, because the mean of its divisors is an integer number (591900).

2^2071643 is an apocalyptic number.

2071643 is a deficient number, since it is larger than the sum of its proper divisors (295957).

2071643 is an equidigital number, since it uses as much as digits as its factorization.

2071643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295956.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 2071643 is about 1439.3203257093. The cubic root of 2071643 is about 127.4788994942.

The spelling of 2071643 in words is "two million, seventy-one thousand, six hundred forty-three".