13451540 has 12 divisors (see below), whose sum is σ = 28248276. Its totient is φ = 5380608.

The previous prime is 13451513. The next prime is 13451617. The reversal of 13451540 is 4515431.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 5317636 = 2852^2 + 2306^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336269 + ... + 336308.

It is an arithmetic number, because the mean of its divisors is an integer number (2354023).

Almost surely, 2^13451540 is an apocalyptic number.

13451540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13451540 is an abundant number, since it is smaller than the sum of its proper divisors (14796736).

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

13451540 is a wasteful number, since it uses less digits than its factorization.

13451540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672586 (or 672584 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 13451540 is about 3667.6341147939. The cubic root of 13451540 is about 237.8249071152.

Adding to 13451540 its reverse (4515431), we get a palindrome (17966971).

The spelling of 13451540 in words is "thirteen million, four hundred fifty-one thousand, five hundred forty".