745985 has 4 divisors (see below), whose sum is σ = 895188. Its totient is φ = 596784.

The previous prime is 745981. The next prime is 745993. The reversal of 745985 is 589547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589547 = 7 ⋅84221.

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 638401 = 328^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 745985 - 2² = 745981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745981) 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, 74594 + ... + 74603.

It is an arithmetic number, because the mean of its divisors is an integer number (223797).

2⁷⁴⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

745985 is a deficient number, since it is larger than the sum of its proper divisors (149203).

745985 is a wasteful number, since it uses less digits than its factorization.

745985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149202.

The product of its digits is 50400, while the sum is 38.

The square root of 745985 is about 863.7042317831. The cubic root of 745985 is about 90.6936119332.

The spelling of 745985 in words is "seven hundred forty-five thousand, nine hundred eighty-five".