1975543 has 2 divisors, whose sum is σ = 1975544. Its totient is φ = 1975542.

The previous prime is 1975529. The next prime is 1975573. The reversal of 1975543 is 3455791.

1975543 is nontrivially palindromic in base 6.

It is a weak prime.

It is an emirp because it is prime and its reverse (3455791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1975543 - 2⁵ = 1975511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1975499 and 1975508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975573) by changing a digit.

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, 987771 + 987772.

It is an arithmetic number, because the mean of its divisors is an integer number (987772).

2^1975543 is an apocalyptic number.

1975543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975543 is an equidigital number, since it uses as much as digits as its factorization.

1975543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 34.

The square root of 1975543 is about 1405.5401097087. The cubic root of 1975543 is about 125.4764324565.

The spelling of 1975543 in words is "one million, nine hundred seventy-five thousand, five hundred forty-three".