13451520 has 144 divisors (see below), whose sum is σ = 44739072. Its totient is φ = 3440640.

The previous prime is 13451513. The next prime is 13451617. The reversal of 13451520 is 2515431.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118984 + ... + 119096.

It is an arithmetic number, because the mean of its divisors is an integer number (310688).

Almost surely, 2^13451520 is an apocalyptic number.

13451520 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 13451520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22369536).

13451520 is an abundant number, since it is smaller than the sum of its proper divisors (31287552).

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

13451520 is a wasteful number, since it uses less digits than its factorization.

13451520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 13451520 is about 3667.6313882396. The cubic root of 13451520 is about 237.8247892476.

Adding to 13451520 its reverse (2515431), we get a palindrome (15966951).

The spelling of 13451520 in words is "thirteen million, four hundred fifty-one thousand, five hundred twenty".