16245520 has 40 divisors (see below), whose sum is σ = 38401560. Its totient is φ = 6389760.

The previous prime is 16245517. The next prime is 16245527. The reversal of 16245520 is 2554261.

It can be written as a sum of positive squares in 4 ways, for example, as 20736 + 16224784 = 144^2 + 4028^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (16245527) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3216 + ... + 6544.

It is an arithmetic number, because the mean of its divisors is an integer number (960039).

Almost surely, 2^16245520 is an apocalyptic number.

16245520 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 16245520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19200780).

16245520 is an abundant number, since it is smaller than the sum of its proper divisors (22156040).

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

16245520 is a wasteful number, since it uses less digits than its factorization.

16245520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403 (or 3397 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 16245520 is about 4030.5731602342. The cubic root of 16245520 is about 253.2665721278.

Adding to 16245520 its reverse (2554261), we get a palindrome (18799781).

The spelling of 16245520 in words is "sixteen million, two hundred forty-five thousand, five hundred twenty".