724641 has 8 divisors (see below), whose sum is σ = 1017120. Its totient is φ = 457632.

The previous prime is 724639. The next prime is 724643. The reversal of 724641 is 146427.

It is an interprime number because it is at equal distance from previous prime (724639) and next prime (724643).

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

It is not a de Polignac number, because 724641 - 2¹ = 724639 is a prime.

724641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (724643) 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, 6300 + ... + 6413.

It is an arithmetic number, because the mean of its divisors is an integer number (127140).

2⁷²⁴⁶⁴¹ is an apocalyptic number.

It is an amenable number.

724641 is a deficient number, since it is larger than the sum of its proper divisors (292479).

724641 is a wasteful number, since it uses less digits than its factorization.

724641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12735.

The product of its digits is 1344, while the sum is 24.

The square root of 724641 is about 851.2584801340. The cubic root of 724641 is about 89.8202585564.

The spelling of 724641 in words is "seven hundred twenty-four thousand, six hundred forty-one".