724261 has 4 divisors (see below), whose sum is σ = 762400. Its totient is φ = 686124.

The previous prime is 724259. The next prime is 724267. The reversal of 724261 is 162427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162427 = 59 ⋅2753.

It is a cyclic number.

It is not a de Polignac number, because 724261 - 2¹ = 724259 is a prime.

It is a super-2 number, since 2×724261² = 1049107992242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 19041 + ... + 19078.

It is an arithmetic number, because the mean of its divisors is an integer number (190600).

2⁷²⁴²⁶¹ is an apocalyptic number.

It is an amenable number.

724261 is a deficient number, since it is larger than the sum of its proper divisors (38139).

724261 is a wasteful number, since it uses less digits than its factorization.

724261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38138.

The product of its digits is 672, while the sum is 22.

The square root of 724261 is about 851.0352519138. The cubic root of 724261 is about 89.8045553019.

Adding to 724261 its reverse (162427), we get a palindrome (886688).

It can be divided in two parts, 72426 and 1, that added together give a palindrome (72427).

The spelling of 724261 in words is "seven hundred twenty-four thousand, two hundred sixty-one".