721479 has 8 divisors (see below), whose sum is σ = 1049472. Its totient is φ = 437240.

The previous prime is 721451. The next prime is 721481. The reversal of 721479 is 974127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721479 - 2⁷ = 721351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10899 + ... + 10964.

It is an arithmetic number, because the mean of its divisors is an integer number (131184).

2⁷²¹⁴⁷⁹ is an apocalyptic number.

721479 is a deficient number, since it is larger than the sum of its proper divisors (327993).

721479 is a wasteful number, since it uses less digits than its factorization.

721479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21877.

The product of its digits is 3528, while the sum is 30.

The square root of 721479 is about 849.3991994345. The cubic root of 721479 is about 89.6894233057.

It can be divided in two parts, 72 and 1479, that added together give a palindrome (1551).

The spelling of 721479 in words is "seven hundred twenty-one thousand, four hundred seventy-nine".