15120065 has 4 divisors (see below), whose sum is σ = 18144084. Its totient is φ = 12096048.

The previous prime is 15120031. The next prime is 15120071. The reversal of 15120065 is 56002151.

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 6848689 + 8271376 = 2617^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120065 - 2¹⁴ = 15103681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512002 + ... + 1512011.

It is an arithmetic number, because the mean of its divisors is an integer number (4536021).

Almost surely, 2^15120065 is an apocalyptic number.

It is an amenable number.

15120065 is a deficient number, since it is larger than the sum of its proper divisors (3024019).

15120065 is an equidigital number, since it uses as much as digits as its factorization.

15120065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024018.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 15120065 is about 3888.4527771339. The cubic root of 15120065 is about 247.2774723313.

The spelling of 15120065 in words is "fifteen million, one hundred twenty thousand, sixty-five".