731043 has 12 divisors (see below), whose sum is σ = 1081080. Its totient is φ = 475776.

The previous prime is 731041. The next prime is 731047. The reversal of 731043 is 340137.

It is not a de Polignac number, because 731043 - 2¹ = 731041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (731041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (90090).

2⁷³¹⁰⁴³ is an apocalyptic number.

731043 is a deficient number, since it is larger than the sum of its proper divisors (350037).

731043 is a wasteful number, since it uses less digits than its factorization.

731043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 731043 is about 855.0105262510. The cubic root of 731043 is about 90.0839956578.

Subtracting from 731043 its sum of digits (18), we obtain a square (731025 = 855²).

The spelling of 731043 in words is "seven hundred thirty-one thousand, forty-three".