744521 has 4 divisors (see below), whose sum is σ = 757200. Its totient is φ = 731844.

The previous prime is 744511. The next prime is 744539. The reversal of 744521 is 125447.

744521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125447 = 7 ⋅17921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6251 + ... + 6368.

It is an arithmetic number, because the mean of its divisors is an integer number (189300).

2⁷⁴⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

744521 is a deficient number, since it is larger than the sum of its proper divisors (12679).

744521 is a wasteful number, since it uses less digits than its factorization.

744521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12678.

The product of its digits is 1120, while the sum is 23.

The square root of 744521 is about 862.8563032162. The cubic root of 744521 is about 90.6342441621.

Adding to 744521 its reverse (125447), we get a palindrome (869968).

The spelling of 744521 in words is "seven hundred forty-four thousand, five hundred twenty-one".