740731 has 6 divisors (see below), whose sum is σ = 756420. Its totient is φ = 725328.

The previous prime is 740717. The next prime is 740737. The reversal of 740731 is 137047.

It is not a de Polignac number, because 740731 - 2⁷ = 740603 is a prime.

It is a super-2 number, since 2×740731² = 1097364828722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (740737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5260 + ... + 5398.

It is an arithmetic number, because the mean of its divisors is an integer number (126070).

2⁷⁴⁰⁷³¹ is an apocalyptic number.

740731 is a deficient number, since it is larger than the sum of its proper divisors (15689).

740731 is an equidigital number, since it uses as much as digits as its factorization.

740731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 740731 is about 860.6573069463. The cubic root of 740731 is about 90.4801906115.

Adding to 740731 its reverse (137047), we get a palindrome (877778).

The spelling of 740731 in words is "seven hundred forty thousand, seven hundred thirty-one".