13401520 has 80 divisors (see below), whose sum is σ = 34560288. Its totient is φ = 4792320.

The previous prime is 13401503. The next prime is 13401523. The reversal of 13401520 is 2510431.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 13401494 and 13401503.

It is not an unprimeable number, because it can be changed into a prime (13401523) 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, 85282 + ... + 85438.

Almost surely, 2^13401520 is an apocalyptic number.

13401520 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 13401520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17280144).

13401520 is an abundant number, since it is smaller than the sum of its proper divisors (21158768).

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

13401520 is a wasteful number, since it uses less digits than its factorization.

13401520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 13401520 is about 3660.8086538359. The cubic root of 13401520 is about 237.5297543516.

Adding to 13401520 its reverse (2510431), we get a palindrome (15911951).

The spelling of 13401520 in words is "thirteen million, four hundred one thousand, five hundred twenty".