14521640 has 96 divisors (see below), whose sum is σ = 39398400. Its totient is φ = 4798080.

The previous prime is 14521631. The next prime is 14521651. The reversal of 14521640 is 4612541.

14521640 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

14521640 is strictly pandigital in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60641 + ... + 60879.

It is an arithmetic number, because the mean of its divisors is an integer number (410400).

Almost surely, 2^14521640 is an apocalyptic number.

14521640 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 14521640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19699200).

14521640 is an abundant number, since it is smaller than the sum of its proper divisors (24876760).

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

14521640 is a wasteful number, since it uses less digits than its factorization.

14521640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 14521640 is about 3810.7269647667. The cubic root of 14521640 is about 243.9711960982.

Subtracting from 14521640 its reverse (4612541), we obtain a palindrome (9909099).

The spelling of 14521640 in words is "fourteen million, five hundred twenty-one thousand, six hundred forty".