740643 has 8 divisors (see below), whose sum is σ = 992256. Its totient is φ = 491400.

The previous prime is 740603. The next prime is 740651. The reversal of 740643 is 346047.

740643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 740643 - 2⁸ = 740387 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (740603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (124032).

2⁷⁴⁰⁶⁴³ is an apocalyptic number.

740643 is a deficient number, since it is larger than the sum of its proper divisors (251613).

740643 is a wasteful number, since it uses less digits than its factorization.

740643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 740643 is about 860.6061817115. The cubic root of 740643 is about 90.4766074070.

The spelling of 740643 in words is "seven hundred forty thousand, six hundred forty-three".