745489 has 4 divisors (see below), whose sum is σ = 749056. Its totient is φ = 741924.

The previous prime is 745477. The next prime is 745517. The reversal of 745489 is 984547.

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: 984547 = 157 ⋅6271.

It is a cyclic number.

It is not a de Polignac number, because 745489 - 2⁹ = 744977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1449 + ... + 1894.

It is an arithmetic number, because the mean of its divisors is an integer number (187264).

2⁷⁴⁵⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

745489 is a deficient number, since it is larger than the sum of its proper divisors (3567).

745489 is a wasteful number, since it uses less digits than its factorization.

745489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566.

The product of its digits is 40320, while the sum is 37.

The square root of 745489 is about 863.4170487082. The cubic root of 745489 is about 90.6735069690.

The spelling of 745489 in words is "seven hundred forty-five thousand, four hundred eighty-nine".