528742 has 4 divisors (see below), whose sum is σ = 793116. Its totient is φ = 264370.

The previous prime is 528719. The next prime is 528763. The reversal of 528742 is 247825.

It is a semiprime because it is the product of two primes.

It is a d-powerful number, because it can be written as 5 + 2 + 7³ + 8 + 4⁶ + 2¹⁹ .

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 528742.

It is a congruent number.

It is an unprimeable number.

528742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132184 + ... + 132187.

It is an arithmetic number, because the mean of its divisors is an integer number (198279).

2⁵²⁸⁷⁴² is an apocalyptic number.

528742 is a deficient number, since it is larger than the sum of its proper divisors (264374).

528742 is a wasteful number, since it uses less digits than its factorization.

528742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264373.

The product of its digits is 4480, while the sum is 28.

The square root of 528742 is about 727.1464776783. The cubic root of 528742 is about 80.8626438031.

It can be divided in two parts, 5287 and 42, that added together give a square (5329 = 73²).

The spelling of 528742 in words is "five hundred twenty-eight thousand, seven hundred forty-two".