730540421 has 32 divisors (see below), whose sum is σ = 855912960. Its totient is φ = 617912064.

The previous prime is 730540417. The next prime is 730540471. The reversal of 730540421 is 124045037.

It is a cyclic number.

It is not a de Polignac number, because 730540421 - 2² = 730540417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730540471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1499840 + ... + 1500326.

It is an arithmetic number, because the mean of its divisors is an integer number (26747280).

Almost surely, 2^730540421 is an apocalyptic number.

It is an amenable number.

730540421 is a deficient number, since it is larger than the sum of its proper divisors (125372539).

730540421 is a wasteful number, since it uses less digits than its factorization.

730540421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 730540421 is about 27028.5112612589. The cubic root of 730540421 is about 900.6334721280.

Adding to 730540421 its reverse (124045037), we get a palindrome (854585458).

The spelling of 730540421 in words is "seven hundred thirty million, five hundred forty thousand, four hundred twenty-one".