13500421 has 8 divisors (see below), whose sum is σ = 15041664. Its totient is φ = 12011520.

The previous prime is 13500419. The next prime is 13500427. The reversal of 13500421 is 12400531.

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 13500421 - 2¹ = 13500419 is a prime.

It is a super-2 number, since 2×13500421² = 364522734354482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13500395 and 13500404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500427) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12540 + ... + 13573.

It is an arithmetic number, because the mean of its divisors is an integer number (1880208).

Almost surely, 2^13500421 is an apocalyptic number.

13500421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13500421 is a deficient number, since it is larger than the sum of its proper divisors (1541243).

13500421 is a wasteful number, since it uses less digits than its factorization.

13500421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26171.

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

The square root of 13500421 is about 3674.2919045715. The cubic root of 13500421 is about 238.1126329393.

Adding to 13500421 its reverse (12400531), we get a palindrome (25900952).

The spelling of 13500421 in words is "thirteen million, five hundred thousand, four hundred twenty-one".