729012 has 24 divisors (see below), whose sum is σ = 1724800. Its totient is φ = 239616.

The previous prime is 728993. The next prime is 729019. The reversal of 729012 is 210927.

It is a happy number.

It is a super-2 number, since 2×729012² = 1062916992288, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 729012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729019) by changing a digit.

729012 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564 + ... + 1332.

2⁷²⁹⁰¹² is an apocalyptic number.

It is an amenable number.

729012 is an abundant number, since it is smaller than the sum of its proper divisors (995788).

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

729012 is a wasteful number, since it uses less digits than its factorization.

729012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 729012 is about 853.8219955002. The cubic root of 729012 is about 90.0004938245. Note that the first 3 decimals are identical.

Adding to 729012 its reverse (210927), we get a palindrome (939939).

The spelling of 729012 in words is "seven hundred twenty-nine thousand, twelve".