721463 has 12 divisors (see below), whose sum is σ = 810432. Its totient is φ = 639360.

The previous prime is 721451. The next prime is 721481. The reversal of 721463 is 364127.

It is not a de Polignac number, because 721463 - 2⁸ = 721207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 721463.

It is not an unprimeable number, because it can be changed into a prime (721163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19481 + ... + 19517.

It is an arithmetic number, because the mean of its divisors is an integer number (67536).

2⁷²¹⁴⁶³ is an apocalyptic number.

721463 is a deficient number, since it is larger than the sum of its proper divisors (88969).

721463 is a wasteful number, since it uses less digits than its factorization.

721463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 85 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 721463 is about 849.3897809604. The cubic root of 721463 is about 89.6887602966.

The spelling of 721463 in words is "seven hundred twenty-one thousand, four hundred sixty-three".