743641 has 4 divisors (see below), whose sum is σ = 782800. Its totient is φ = 704484.

The previous prime is 743609. The next prime is 743657. The reversal of 743641 is 146347.

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.

It is a cyclic number.

It is not a de Polignac number, because 743641 - 2⁵ = 743609 is a prime.

743641 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (743671) 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 3 ways as a sum of consecutive naturals, for example, 19551 + ... + 19588.

It is an arithmetic number, because the mean of its divisors is an integer number (195700).

2⁷⁴³⁶⁴¹ is an apocalyptic number.

It is an amenable number.

743641 is a deficient number, since it is larger than the sum of its proper divisors (39159).

743641 is a wasteful number, since it uses less digits than its factorization.

743641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39158.

The product of its digits is 2016, while the sum is 25.

The square root of 743641 is about 862.3462181746. The cubic root of 743641 is about 90.5985211583.

Adding to 743641 its reverse (146347), we get a palindrome (889988).

The spelling of 743641 in words is "seven hundred forty-three thousand, six hundred forty-one".