15243145 has 4 divisors (see below), whose sum is σ = 18291780. Its totient is φ = 12194512.

The previous prime is 15243139. The next prime is 15243161. The reversal of 15243145 is 54134251.

It is a happy number.

15243145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4359744 + 10883401 = 2088^2 + 3299^2 .

It is a cyclic number.

It is not a de Polignac number, because 15243145 - 2¹³ = 15234953 is a prime.

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, 1524310 + ... + 1524319.

It is an arithmetic number, because the mean of its divisors is an integer number (4572945).

Almost surely, 2^15243145 is an apocalyptic number.

It is an amenable number.

15243145 is a deficient number, since it is larger than the sum of its proper divisors (3048635).

15243145 is an equidigital number, since it uses as much as digits as its factorization.

15243145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048634.

The product of its digits is 2400, while the sum is 25.

The square root of 15243145 is about 3904.2470464867. The cubic root of 15243145 is about 247.9466207089.

Adding to 15243145 its reverse (54134251), we get a palindrome (69377396).

The spelling of 15243145 in words is "fifteen million, two hundred forty-three thousand, one hundred forty-five".