745730 has 8 divisors (see below), whose sum is σ = 1342332. Its totient is φ = 298288.

The previous prime is 745727. The next prime is 745733. The reversal of 745730 is 37547.

It is an interprime number because it is at equal distance from previous prime (745727) and next prime (745733).

It can be written as a sum of positive squares in 2 ways, for example, as 744769 + 961 = 863^2 + 31^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×745730² = 1112226465800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 745730.

It is not an unprimeable number, because it can be changed into a prime (745733) 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, 37277 + ... + 37296.

2⁷⁴⁵⁷³⁰ is an apocalyptic number.

745730 is a deficient number, since it is larger than the sum of its proper divisors (596602).

745730 is a wasteful number, since it uses less digits than its factorization.

745730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74580.

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 745730 is about 863.5565991873. The cubic root of 745730 is about 90.6832768251.

The spelling of 745730 in words is "seven hundred forty-five thousand, seven hundred thirty".