745239 has 12 divisors (see below), whose sum is σ = 1092728. Its totient is φ = 451440.

The previous prime is 745231. The next prime is 745243. The reversal of 745239 is 932547.

It is not a de Polignac number, because 745239 - 2³ = 745231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 664 + ... + 1389.

2⁷⁴⁵²³⁹ is an apocalyptic number.

745239 is a deficient number, since it is larger than the sum of its proper divisors (347489).

745239 is a wasteful number, since it uses less digits than its factorization.

745239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078 (or 2067 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 745239 is about 863.2722629623. The cubic root of 745239 is about 90.6633700382.

The spelling of 745239 in words is "seven hundred forty-five thousand, two hundred thirty-nine".