15072109 has 4 divisors (see below), whose sum is σ = 16231516. Its totient is φ = 13912704.

The previous prime is 15072103. The next prime is 15072131. The reversal of 15072109 is 90127051.

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 8584900 + 6487209 = 2930^2 + 2547^2 .

It is not a de Polignac number, because 15072109 - 2⁵ = 15072077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15072103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579684 + ... + 579709.

It is an arithmetic number, because the mean of its divisors is an integer number (4057879).

Almost surely, 2^15072109 is an apocalyptic number.

It is an amenable number.

15072109 is a deficient number, since it is larger than the sum of its proper divisors (1159407).

15072109 is a wasteful number, since it uses less digits than its factorization.

15072109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159406.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 15072109 is about 3882.2814168991. The cubic root of 15072109 is about 247.0157671588.

The spelling of 15072109 in words is "fifteen million, seventy-two thousand, one hundred nine".