15945145 has 4 divisors (see below), whose sum is σ = 19134180. Its totient is φ = 12756112.

The previous prime is 15945119. The next prime is 15945179. The reversal of 15945145 is 54154951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54154951 = 47 ⋅1152233.

It can be written as a sum of positive squares in 2 ways, for example, as 7856809 + 8088336 = 2803^2 + 2844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15945145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15945145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1594510 + ... + 1594519.

It is an arithmetic number, because the mean of its divisors is an integer number (4783545).

Almost surely, 2^15945145 is an apocalyptic number.

It is an amenable number.

15945145 is a deficient number, since it is larger than the sum of its proper divisors (3189035).

15945145 is an equidigital number, since it uses as much as digits as its factorization.

15945145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189034.

The product of its digits is 18000, while the sum is 34.

The square root of 15945145 is about 3993.1372378119. The cubic root of 15945145 is about 251.6959095492.

The spelling of 15945145 in words is "fifteen million, nine hundred forty-five thousand, one hundred forty-five".