15123147 has 16 divisors (see below), whose sum is σ = 21964320. Its totient is φ = 9199872.

The previous prime is 15123109. The next prime is 15123161. The reversal of 15123147 is 74132151.

It is not a de Polignac number, because 15123147 - 2⁶ = 15123083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15123187) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1293 + ... + 5649.

It is an arithmetic number, because the mean of its divisors is an integer number (1372770).

Almost surely, 2^15123147 is an apocalyptic number.

15123147 is a deficient number, since it is larger than the sum of its proper divisors (6841173).

15123147 is a wasteful number, since it uses less digits than its factorization.

15123147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462.

The product of its digits is 840, while the sum is 24.

The square root of 15123147 is about 3888.8490585262. The cubic root of 15123147 is about 247.2942724662.

Adding to 15123147 its reverse (74132151), we get a palindrome (89255298).

It can be divided in two parts, 15123 and 147, that multiplied together give a square (2223081 = 1491²).

The spelling of 15123147 in words is "fifteen million, one hundred twenty-three thousand, one hundred forty-seven".