13442420 has 24 divisors (see below), whose sum is σ = 28316904. Its totient is φ = 5360256.

The previous prime is 13442417. The next prime is 13442441. The reversal of 13442420 is 2424431.

It can be written as a sum of positive squares in 4 ways, for example, as 1567504 + 11874916 = 1252^2 + 3446^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13442392 and 13442401.

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 7 ways as a sum of consecutive naturals, for example, 7094 + ... + 8786.

It is an arithmetic number, because the mean of its divisors is an integer number (1179871).

Almost surely, 2^13442420 is an apocalyptic number.

13442420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13442420 is an abundant number, since it is smaller than the sum of its proper divisors (14874484).

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

13442420 is a wasteful number, since it uses less digits than its factorization.

13442420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 13442420 is about 3666.3905956676. The cubic root of 13442420 is about 237.7711473842.

Adding to 13442420 its reverse (2424431), we get a palindrome (15866851).

The spelling of 13442420 in words is "thirteen million, four hundred forty-two thousand, four hundred twenty".