13512420 has 120 divisors (see below), whose sum is σ = 44721600. Its totient is φ = 3405888.

The previous prime is 13512409. The next prime is 13512461. The reversal of 13512420 is 2421531.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13512393 and 13512402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30561 + ... + 30999.

It is an arithmetic number, because the mean of its divisors is an integer number (372680).

Almost surely, 2^13512420 is an apocalyptic number.

13512420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13512420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22360800).

13512420 is an abundant number, since it is smaller than the sum of its proper divisors (31209180).

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

13512420 is a wasteful number, since it uses less digits than its factorization.

13512420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13512420 is about 3675.9243735420. The cubic root of 13512420 is about 238.1831558621.

Adding to 13512420 its reverse (2421531), we get a palindrome (15933951).

The spelling of 13512420 in words is "thirteen million, five hundred twelve thousand, four hundred twenty".