724287 has 4 divisors (see below), whose sum is σ = 965720. Its totient is φ = 482856.

The previous prime is 724277. The next prime is 724291. The reversal of 724287 is 782427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782427 = 3 ⋅260809.

It is not a de Polignac number, because 724287 - 2¹⁰ = 723263 is a prime.

It is a D-number.

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 724287.

It is not an unprimeable number, because it can be changed into a prime (724267) 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, 120712 + ... + 120717.

It is an arithmetic number, because the mean of its divisors is an integer number (241430).

2⁷²⁴²⁸⁷ is an apocalyptic number.

724287 is a deficient number, since it is larger than the sum of its proper divisors (241433).

724287 is a wasteful number, since it uses less digits than its factorization.

724287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241432.

The product of its digits is 6272, while the sum is 30.

The square root of 724287 is about 851.0505272897. The cubic root of 724287 is about 89.8056299101.

The spelling of 724287 in words is "seven hundred twenty-four thousand, two hundred eighty-seven".