13481540 has 24 divisors (see below), whose sum is σ = 28438872. Its totient is φ = 5368320.

The previous prime is 13481477. The next prime is 13481569. The reversal of 13481540 is 4518431.

13481540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4032064 + 9449476 = 2008^2 + 3074^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3422 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (1184953).

Almost surely, 2^13481540 is an apocalyptic number.

13481540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13481540 is an abundant number, since it is smaller than the sum of its proper divisors (14957332).

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

13481540 is a wasteful number, since it uses less digits than its factorization.

13481540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047 (or 3045 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 13481540 is about 3671.7216670113. The cubic root of 13481540 is about 238.0015770910.

Adding to 13481540 its reverse (4518431), we get a palindrome (17999971).

The spelling of 13481540 in words is "thirteen million, four hundred eighty-one thousand, five hundred forty".