1971043 has 4 divisors (see below), whose sum is σ = 2039040. Its totient is φ = 1903048.

The previous prime is 1971029. The next prime is 1971049. The reversal of 1971043 is 3401791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3401791 = 67 ⋅50773.

It is a cyclic number.

It is not a de Polignac number, because 1971043 - 2⁹ = 1970531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1970999 and 1971017.

It is not an unprimeable number, because it can be changed into a prime (1971049) 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, 33955 + ... + 34012.

It is an arithmetic number, because the mean of its divisors is an integer number (509760).

2^1971043 is an apocalyptic number.

1971043 is a deficient number, since it is larger than the sum of its proper divisors (67997).

1971043 is an equidigital number, since it uses as much as digits as its factorization.

1971043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67996.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1971043 is about 1403.9383889616. The cubic root of 1971043 is about 125.3810876635.

The spelling of 1971043 in words is "one million, nine hundred seventy-one thousand, forty-three".