15115420 has 12 divisors (see below), whose sum is σ = 31742424. Its totient is φ = 6046160.

The previous prime is 15115417. The next prime is 15115427. The reversal of 15115420 is 2451151.

15115420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15115427) 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, 377866 + ... + 377905.

It is an arithmetic number, because the mean of its divisors is an integer number (2645202).

Almost surely, 2^15115420 is an apocalyptic number.

15115420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15115420 is an abundant number, since it is smaller than the sum of its proper divisors (16627004).

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

15115420 is a wasteful number, since it uses less digits than its factorization.

15115420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755780 (or 755778 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 15115420 is about 3887.8554499878. The cubic root of 15115420 is about 247.2521478921.

Adding to 15115420 its reverse (2451151), we get a palindrome (17566571).

The spelling of 15115420 in words is "fifteen million, one hundred fifteen thousand, four hundred twenty".