724565 has 16 divisors (see below), whose sum is σ = 950400. Its totient is φ = 528192.

The previous prime is 724553. The next prime is 724567. The reversal of 724565 is 565427.

724565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 724565 - 2⁸ = 724309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2624 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (59400).

2⁷²⁴⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

724565 is a deficient number, since it is larger than the sum of its proper divisors (225835).

724565 is a wasteful number, since it uses less digits than its factorization.

724565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316.

The product of its digits is 8400, while the sum is 29.

The square root of 724565 is about 851.2138391732. The cubic root of 724565 is about 89.8171183448.

It can be divided in two parts, 724 and 565, that multiplied together give a triangular number (409060 = T₉₀₄).

The spelling of 724565 in words is "seven hundred twenty-four thousand, five hundred sixty-five".