744561 has 6 divisors (see below), whose sum is σ = 1075490. Its totient is φ = 496368.

The previous prime is 744559. The next prime is 744599. The reversal of 744561 is 165447.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 136161 = 780^2 + 369^2 .

It is not a de Polignac number, because 744561 - 2¹ = 744559 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41356 + ... + 41373.

2⁷⁴⁴⁵⁶¹ is an apocalyptic number.

It is an amenable number.

744561 is a deficient number, since it is larger than the sum of its proper divisors (330929).

744561 is a wasteful number, since it uses less digits than its factorization.

744561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82735 (or 82732 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 744561 is about 862.8794817354. The cubic root of 744561 is about 90.6358672660.

The spelling of 744561 in words is "seven hundred forty-four thousand, five hundred sixty-one".