729481 has 4 divisors (see below), whose sum is σ = 734464. Its totient is φ = 724500.

The previous prime is 729473. The next prime is 729493. The reversal of 729481 is 184927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184927 = 19 ⋅9733.

It is a cyclic number.

It is not a de Polignac number, because 729481 - 2³ = 729473 is a prime.

It is a super-2 number, since 2×729481² = 1064285058722, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (729451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2265 + ... + 2566.

It is an arithmetic number, because the mean of its divisors is an integer number (183616).

2⁷²⁹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

729481 is a deficient number, since it is larger than the sum of its proper divisors (4983).

729481 is a wasteful number, since it uses less digits than its factorization.

729481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982.

The product of its digits is 4032, while the sum is 31.

The square root of 729481 is about 854.0965987522. The cubic root of 729481 is about 90.0197898868.

The spelling of 729481 in words is "seven hundred twenty-nine thousand, four hundred eighty-one".