13212342 has 128 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 3507840.

The previous prime is 13212341. The next prime is 13212347. The reversal of 13212342 is 24321231.

13212342 is a `hidden beast` number, since 1 + 321 + 2 + 342 = 666.

It is a super-2 number, since 2×13212342² = 349131962249928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212341) 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 63 ways as a sum of consecutive naturals, for example, 223909 + ... + 223967.

It is an arithmetic number, because the mean of its divisors is an integer number (283500).

Almost surely, 2^13212342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13212342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18144000).

13212342 is an abundant number, since it is smaller than the sum of its proper divisors (23075658).

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

13212342 is a wasteful number, since it uses less digits than its factorization.

13212342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 117 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 13212342 is about 3634.8785399240. The cubic root of 13212342 is about 236.4067843140.

Adding to 13212342 its reverse (24321231), we get a palindrome (37533573).

Subtracting 13212342 from its reverse (24321231), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 1321 and 2342, that added together give a palindrome (3663).

The spelling of 13212342 in words is "thirteen million, two hundred twelve thousand, three hundred forty-two".