14021520 has 80 divisors (see below), whose sum is σ = 44669760. Its totient is φ = 3635712.

The previous prime is 14021519. The next prime is 14021531. The reversal of 14021520 is 2512041.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×14021520² = 393206046220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 14021520.

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 15 ways as a sum of consecutive naturals, for example, 8091 + ... + 9669.

It is an arithmetic number, because the mean of its divisors is an integer number (558372).

Almost surely, 2^14021520 is an apocalyptic number.

14021520 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 14021520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22334880).

14021520 is an abundant number, since it is smaller than the sum of its proper divisors (30648240).

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

14021520 is a wasteful number, since it uses less digits than its factorization.

14021520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 14021520 is about 3744.5320134831. The cubic root of 14021520 is about 241.1376542959.

Adding to 14021520 its reverse (2512041), we get a palindrome (16533561).

It can be divided in two parts, 14021 and 520, that added together give a palindrome (14541).

The spelling of 14021520 in words is "fourteen million, twenty-one thousand, five hundred twenty".