742528 has 16 divisors (see below), whose sum is σ = 1479510. Its totient is φ = 371200.

The previous prime is 742519. The next prime is 742531. The reversal of 742528 is 825247.

It can be written as a sum of positive squares in only one way, i.e., 419904 + 322624 = 648^2 + 568^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 742496 and 742505.

It is an unprimeable 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, 2773 + ... + 3028.

2⁷⁴²⁵²⁸ is an apocalyptic number.

It is an amenable number.

742528 is a deficient number, since it is larger than the sum of its proper divisors (736982).

742528 is an equidigital number, since it uses as much as digits as its factorization.

742528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5815 (or 5803 counting only the distinct ones).

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

The square root of 742528 is about 861.7006440754. The cubic root of 742528 is about 90.5532992915.

The spelling of 742528 in words is "seven hundred forty-two thousand, five hundred twenty-eight".