12730565 has 8 divisors (see below), whose sum is σ = 15803640. Its totient is φ = 9833152.

The previous prime is 12730519. The next prime is 12730567. The reversal of 12730565 is 56503721.

It can be written as a sum of positive squares in 4 ways, for example, as 1965604 + 10764961 = 1402^2 + 3281^2 .

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 12730565 - 2⁸ = 12730309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730567) 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, 43754 + ... + 44043.

It is an arithmetic number, because the mean of its divisors is an integer number (1975455).

Almost surely, 2^12730565 is an apocalyptic number.

It is an amenable number.

12730565 is a deficient number, since it is larger than the sum of its proper divisors (3073075).

12730565 is an equidigital number, since it uses as much as digits as its factorization.

12730565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87831.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 12730565 is about 3567.9917320532. The cubic root of 12730565 is about 233.4976744736.

The spelling of 12730565 in words is "twelve million, seven hundred thirty thousand, five hundred sixty-five".