15345145 has 4 divisors (see below), whose sum is σ = 18414180. Its totient is φ = 12276112.

The previous prime is 15345139. The next prime is 15345149. The reversal of 15345145 is 54154351.

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 8934121 + 6411024 = 2989^2 + 2532^2 .

It is a cyclic number.

It is not a de Polignac number, because 15345145 - 2⁹ = 15344633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15345149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534510 + ... + 1534519.

It is an arithmetic number, because the mean of its divisors is an integer number (4603545).

Almost surely, 2^15345145 is an apocalyptic number.

It is an amenable number.

15345145 is a deficient number, since it is larger than the sum of its proper divisors (3069035).

15345145 is an equidigital number, since it uses as much as digits as its factorization.

15345145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069034.

The product of its digits is 6000, while the sum is 28.

The square root of 15345145 is about 3917.2879649063. The cubic root of 15345145 is about 248.4984393183.

Adding to 15345145 its reverse (54154351), we get a palindrome (69499496).

The spelling of 15345145 in words is "fifteen million, three hundred forty-five thousand, one hundred forty-five".