15873145 has 8 divisors (see below), whose sum is σ = 19099080. Its totient is φ = 12664320.

The previous prime is 15873127. The next prime is 15873161. The reversal of 15873145 is 54137851.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 215296 + 15657849 = 464^2 + 3957^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15873145 - 2¹⁹ = 15348857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15873145.

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 7 ways as a sum of consecutive naturals, for example, 2136 + ... + 6025.

It is an arithmetic number, because the mean of its divisors is an integer number (2387385).

Almost surely, 2^15873145 is an apocalyptic number.

It is an amenable number.

15873145 is a deficient number, since it is larger than the sum of its proper divisors (3225935).

15873145 is an equidigital number, since it uses as much as digits as its factorization.

15873145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8555.

The product of its digits is 16800, while the sum is 34.

The square root of 15873145 is about 3984.1115697229. Note that the first 3 decimals coincide. The cubic root of 15873145 is about 251.3164951926.

It can be divided in two parts, 15873 and 145, that multiplied together give a triangular number (2301585 = T₂₁₄₅).

The spelling of 15873145 in words is "fifteen million, eight hundred seventy-three thousand, one hundred forty-five".