13511421 has 64 divisors (see below), whose sum is σ = 25589760. Its totient is φ = 6842880.

The previous prime is 13511411. The next prime is 13511429. The reversal of 13511421 is 12411531.

It is not a de Polignac number, because 13511421 - 2⁷ = 13511293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13511394 and 13511403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13511429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139245 + ... + 139341.

It is an arithmetic number, because the mean of its divisors is an integer number (399840).

Almost surely, 2^13511421 is an apocalyptic number.

13511421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13511421 is a deficient number, since it is larger than the sum of its proper divisors (12078339).

13511421 is a wasteful number, since it uses less digits than its factorization.

13511421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 185 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 13511421 is about 3675.7884868420. The cubic root of 13511421 is about 238.1772859332.

Adding to 13511421 its reverse (12411531), we get a palindrome (25922952).

It can be divided in two parts, 1351 and 1421, that added together give a palindrome (2772).

The spelling of 13511421 in words is "thirteen million, five hundred eleven thousand, four hundred twenty-one".