730145 has 16 divisors (see below), whose sum is σ = 967680. Its totient is φ = 525504.

The previous prime is 730139. The next prime is 730157. The reversal of 730145 is 541037.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 730145 - 2¹⁸ = 468001 is a prime.

It is a super-2 number, since 2×730145² = 1066223442050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2936 + ... + 3174.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁷³⁰¹⁴⁵ is an apocalyptic number.

It is an amenable number.

730145 is a deficient number, since it is larger than the sum of its proper divisors (237535).

730145 is a wasteful number, since it uses less digits than its factorization.

730145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 730145 is about 854.4852251502. The cubic root of 730145 is about 90.0470946938.

The spelling of 730145 in words is "seven hundred thirty thousand, one hundred forty-five".