730601521 has 8 divisors (see below), whose sum is σ = 812182784. Its totient is φ = 652646160.

The previous prime is 730601497. The next prime is 730601527. The reversal of 730601521 is 125106037.

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

It is a cyclic number.

It is not a de Polignac number, because 730601521 - 2⁷ = 730601393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730601527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906051 + ... + 906856.

It is an arithmetic number, because the mean of its divisors is an integer number (101522848).

Almost surely, 2^730601521 is an apocalyptic number.

It is an amenable number.

730601521 is a deficient number, since it is larger than the sum of its proper divisors (81581263).

730601521 is a wasteful number, since it uses less digits than its factorization.

730601521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812951.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 730601521 is about 27029.6415255549. The cubic root of 730601521 is about 900.6585801026.

Adding to 730601521 its reverse (125106037), we get a palindrome (855707558).

The spelling of 730601521 in words is "seven hundred thirty million, six hundred one thousand, five hundred twenty-one".