102742443 has 12 divisors (see below), whose sum is σ = 156216840. Its totient is φ = 64889856.

The previous prime is 102742429. The next prime is 102742487. The reversal of 102742443 is 344247201.

It is not a de Polignac number, because 102742443 - 2¹³ = 102734251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102742643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300246 + ... + 300587.

It is an arithmetic number, because the mean of its divisors is an integer number (13018070).

Almost surely, 2^102742443 is an apocalyptic number.

102742443 is a deficient number, since it is larger than the sum of its proper divisors (53474397).

102742443 is a wasteful number, since it uses less digits than its factorization.

102742443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600858 (or 600855 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 102742443 is about 10136.1947001821. The cubic root of 102742443 is about 468.3637731622.

Adding to 102742443 its reverse (344247201), we get a palindrome (446989644).

The spelling of 102742443 in words is "one hundred two million, seven hundred forty-two thousand, four hundred forty-three".