15730345 has 4 divisors (see below), whose sum is σ = 18876420. Its totient is φ = 12584272.

The previous prime is 15730343. The next prime is 15730381. The reversal of 15730345 is 54303751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7139584 + 8590761 = 2672^2 + 2931^2 .

It is a cyclic number.

It is not a de Polignac number, because 15730345 - 2¹ = 15730343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15730343) 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, 1573030 + ... + 1573039.

It is an arithmetic number, because the mean of its divisors is an integer number (4719105).

Almost surely, 2^15730345 is an apocalyptic number.

It is an amenable number.

15730345 is a deficient number, since it is larger than the sum of its proper divisors (3146075).

15730345 is an equidigital number, since it uses as much as digits as its factorization.

15730345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146074.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 15730345 is about 3966.1498963100. The cubic root of 15730345 is about 250.5605820515.

The spelling of 15730345 in words is "fifteen million, seven hundred thirty thousand, three hundred forty-five".