730542 has 16 divisors (see below), whose sum is σ = 1469520. Its totient is φ = 242112.

The previous prime is 730537. The next prime is 730553. The reversal of 730542 is 245037.

It is a happy number.

It is a super-2 number, since 2×730542² = 1067383227528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

730542 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1684 + ... + 2072.

It is an arithmetic number, because the mean of its divisors is an integer number (91845).

2⁷³⁰⁵⁴² is an apocalyptic number.

730542 is an abundant number, since it is smaller than the sum of its proper divisors (738978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

730542 is a wasteful number, since it uses less digits than its factorization.

730542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 730542 is about 854.7174971884. The cubic root of 730542 is about 90.0634121008.

Adding to 730542 its reverse (245037), we get a palindrome (975579).

The spelling of 730542 in words is "seven hundred thirty thousand, five hundred forty-two".