15121120 has 96 divisors (see below), whose sum is σ = 42674688. Its totient is φ = 4950528.

The previous prime is 15121111. The next prime is 15121157. The reversal of 15121120 is 2112151.

It is a self number, because there is not a number n which added to its sum of digits gives 15121120.

It is a congruent number.

It is an unprimeable number.

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, 25467 + ... + 26053.

It is an arithmetic number, because the mean of its divisors is an integer number (444528).

Almost surely, 2^15121120 is an apocalyptic number.

15121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21337344).

15121120 is an abundant number, since it is smaller than the sum of its proper divisors (27553568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15121120 is a wasteful number, since it uses less digits than its factorization.

15121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 15121120 is about 3888.5884328378. The cubic root of 15121120 is about 247.2832234456.

Adding to 15121120 its reverse (2112151), we get a palindrome (17233271).

The spelling of 15121120 in words is "fifteen million, one hundred twenty-one thousand, one hundred twenty".