13521430 has 32 divisors (see below), whose sum is σ = 26780544. Its totient is φ = 4884096.

The previous prime is 13521421. The next prime is 13521437. The reversal of 13521430 is 3412531.

It is a junction number, because it is equal to n+sod(n) for n = 13521398 and 13521407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5004 + ... + 7216.

It is an arithmetic number, because the mean of its divisors is an integer number (836892).

Almost surely, 2^13521430 is an apocalyptic number.

13521430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13521430 is a deficient number, since it is larger than the sum of its proper divisors (13259114).

13521430 is a wasteful number, since it uses less digits than its factorization.

13521430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13521430 is about 3677.1497113933. The cubic root of 13521430 is about 238.2360837962.

Adding to 13521430 its reverse (3412531), we get a palindrome (16933961).

The spelling of 13521430 in words is "thirteen million, five hundred twenty-one thousand, four hundred thirty".