731601 has 24 divisors (see below), whose sum is σ = 1175720. Its totient is φ = 438048.

The previous prime is 731597. The next prime is 731603. The reversal of 731601 is 106137.

731601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 90000 + 641601 = 300^2 + 801^2 .

It is not a de Polignac number, because 731601 - 2² = 731597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (731603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19755 + ... + 19791.

2⁷³¹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

731601 is a deficient number, since it is larger than the sum of its proper divisors (444119).

731601 is a wasteful number, since it uses less digits than its factorization.

731601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 731601 is about 855.3367757790. The cubic root of 731601 is about 90.1069099896.

Adding to 731601 its reverse (106137), we get a palindrome (837738).

The spelling of 731601 in words is "seven hundred thirty-one thousand, six hundred one".