745513 has 4 divisors (see below), whose sum is σ = 765700. Its totient is φ = 725328.

The previous prime is 745477. The next prime is 745517. The reversal of 745513 is 315547.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 522729 + 222784 = 723^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 745513 - 2⁹ = 745001 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (745517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10038 + ... + 10111.

It is an arithmetic number, because the mean of its divisors is an integer number (191425).

2⁷⁴⁵⁵¹³ is an apocalyptic number.

It is an amenable number.

745513 is a deficient number, since it is larger than the sum of its proper divisors (20187).

745513 is a wasteful number, since it uses less digits than its factorization.

745513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20186.

The product of its digits is 2100, while the sum is 25.

The square root of 745513 is about 863.4309468626. The cubic root of 745513 is about 90.6744799951.

The spelling of 745513 in words is "seven hundred forty-five thousand, five hundred thirteen".