724181 has 4 divisors (see below), whose sum is σ = 728364. Its totient is φ = 720000.

The previous prime is 724153. The next prime is 724187. The reversal of 724181 is 181427.

724181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 181427 = 419 ⋅433.

It can be written as a sum of positive squares in 2 ways, for example, as 16900 + 707281 = 130^2 + 841^2 .

It is a cyclic number.

It is not a de Polignac number, because 724181 - 2⁶ = 724117 is a prime.

It is a super-2 number, since 2×724181² = 1048876241522, which contains 22 as substring.

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 724181.

It is not an unprimeable number, because it can be changed into a prime (724187) 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, 1820 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (182091).

2⁷²⁴¹⁸¹ is an apocalyptic number.

It is an amenable number.

724181 is a deficient number, since it is larger than the sum of its proper divisors (4183).

724181 is a wasteful number, since it uses less digits than its factorization.

724181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182.

The product of its digits is 448, while the sum is 23.

The square root of 724181 is about 850.9882490376. The cubic root of 724181 is about 89.8012486537.

It can be divided in two parts, 724 and 181, that multiplied together give a square (131044 = 362²).

The spelling of 724181 in words is "seven hundred twenty-four thousand, one hundred eighty-one".