13140521 has 8 divisors (see below), whose sum is σ = 13763904. Its totient is φ = 12521520.

The previous prime is 13140503. The next prime is 13140527. The reversal of 13140521 is 12504131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13140521 - 2¹⁸ = 12878377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13140521.

It is not an unprimeable number, because it can be changed into a prime (13140527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6131 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (1720488).

Almost surely, 2^13140521 is an apocalyptic number.

It is an amenable number.

13140521 is a deficient number, since it is larger than the sum of its proper divisors (623383).

13140521 is a wasteful number, since it uses less digits than its factorization.

13140521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 13140521 is about 3624.9856551440. The cubic root of 13140521 is about 235.9776443920.

Adding to 13140521 its reverse (12504131), we get a palindrome (25644652).

The spelling of 13140521 in words is "thirteen million, one hundred forty thousand, five hundred twenty-one".