102005443 has 4 divisors (see below), whose sum is σ = 103930128. Its totient is φ = 100080760.

The previous prime is 102005413. The next prime is 102005447. The reversal of 102005443 is 344500201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344500201 = 3623 ⋅95087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102005443 is a prime.

It is a super-2 number, since 2×102005443² = 20810220803252498, 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 102005443.

It is not an unprimeable number, because it can be changed into a prime (102005447) 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 in 3 ways as a sum of consecutive naturals, for example, 962263 + ... + 962368.

It is an arithmetic number, because the mean of its divisors is an integer number (25982532).

Almost surely, 2^102005443 is an apocalyptic number.

102005443 is a deficient number, since it is larger than the sum of its proper divisors (1924685).

102005443 is an equidigital number, since it uses as much as digits as its factorization.

102005443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924684.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 102005443 is about 10099.7744034211. The cubic root of 102005443 is about 467.2411836306.

Adding to 102005443 its reverse (344500201), we get a palindrome (446505644).

The spelling of 102005443 in words is "one hundred two million, five thousand, four hundred forty-three".