730551 has 4 divisors (see below), whose sum is σ = 974072. Its totient is φ = 487032.

The previous prime is 730537. The next prime is 730553. The reversal of 730551 is 155037.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155037 = 3 ⋅51679.

It is not a de Polignac number, because 730551 - 2⁶ = 730487 is a prime.

It is a D-number.

It is a Duffinian number.

730551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730553) 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, 121756 + ... + 121761.

It is an arithmetic number, because the mean of its divisors is an integer number (243518).

2⁷³⁰⁵⁵¹ is an apocalyptic number.

730551 is a deficient number, since it is larger than the sum of its proper divisors (243521).

730551 is a wasteful number, since it uses less digits than its factorization.

730551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243520.

The product of its (nonzero) digits is 525, while the sum is 21.

The square root of 730551 is about 854.7227620697. The cubic root of 730551 is about 90.0637819483.

Adding to 730551 its reverse (155037), we get a palindrome (885588).

The spelling of 730551 in words is "seven hundred thirty thousand, five hundred fifty-one".