15120147 has 8 divisors (see below), whose sum is σ = 23040256. Its totient is φ = 8640072.

The previous prime is 15120139. The next prime is 15120167. The reversal of 15120147 is 74102151.

It is a happy number.

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

It is not a de Polignac number, because 15120147 - 2³ = 15120139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 720007 = 15120147 / (1 + 5 + 1 + 2 + 0 + 1 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15120137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359983 + ... + 360024.

It is an arithmetic number, because the mean of its divisors is an integer number (2880032).

Almost surely, 2^15120147 is an apocalyptic number.

15120147 is a deficient number, since it is larger than the sum of its proper divisors (7920109).

15120147 is an equidigital number, since it uses as much as digits as its factorization.

15120147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720017.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 15120147 is about 3888.4633211591. The cubic root of 15120147 is about 247.2779193469.

Adding to 15120147 its reverse (74102151), we get a palindrome (89222298).

The spelling of 15120147 in words is "fifteen million, one hundred twenty thousand, one hundred forty-seven".