13442520 has 128 divisors (see below), whose sum is σ = 49674240. Its totient is φ = 2833920.

The previous prime is 13442483. The next prime is 13442537. The reversal of 13442520 is 2524431.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 10305 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (388080).

Almost surely, 2^13442520 is an apocalyptic number.

13442520 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 13442520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24837120).

13442520 is an abundant number, since it is smaller than the sum of its proper divisors (36231720).

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

13442520 is a wasteful number, since it uses less digits than its factorization.

13442520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 13442520 is about 3666.4042330327. The cubic root of 13442520 is about 237.7717369868.

Adding to 13442520 its reverse (2524431), we get a palindrome (15966951).

The spelling of 13442520 in words is "thirteen million, four hundred forty-two thousand, five hundred twenty".