744457 has 6 divisors (see below), whose sum is σ = 866058. Its totient is φ = 638064.

The previous prime is 744451. The next prime is 744493. The reversal of 744457 is 754447.

It can be written as a sum of positive squares in only one way, i.e., 741321 + 3136 = 861^2 + 56^2 .

It is not a de Polignac number, because 744457 - 2¹¹ = 742409 is a prime.

It is a Duffinian number.

744457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (744451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7548 + ... + 7645.

It is an arithmetic number, because the mean of its divisors is an integer number (144343).

2⁷⁴⁴⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

744457 is a deficient number, since it is larger than the sum of its proper divisors (121601).

744457 is a wasteful number, since it uses less digits than its factorization.

744457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15207 (or 15200 counting only the distinct ones).

The product of its digits is 15680, while the sum is 31.

The square root of 744457 is about 862.8192162904. The cubic root of 744457 is about 90.6316470749.

The spelling of 744457 in words is "seven hundred forty-four thousand, four hundred fifty-seven".