1025543 has 2 divisors, whose sum is σ = 1025544. Its totient is φ = 1025542.

The previous prime is 1025537. The next prime is 1025551. The reversal of 1025543 is 3455201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025543 - 2¹⁴ = 1009159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025503) 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 as a sum of consecutive naturals, namely, 512771 + 512772.

It is an arithmetic number, because the mean of its divisors is an integer number (512772).

2^1025543 is an apocalyptic number.

1025543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025543 is an equidigital number, since it uses as much as digits as its factorization.

1025543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1025543 is about 1012.6909696447. The cubic root of 1025543 is about 100.8442850993.

The spelling of 1025543 in words is "one million, twenty-five thousand, five hundred forty-three".