13720146 has 32 divisors (see below), whose sum is σ = 30578688. Its totient is φ = 4068240.

The previous prime is 13720129. The next prime is 13720159. The reversal of 13720146 is 64102731.

It is a super-2 number, since 2×13720146² = 376484812522632, which contains 22 as substring.

It is a zygodrome in base 7.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (955584).

Almost surely, 2^13720146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13720146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15289344).

13720146 is an abundant number, since it is smaller than the sum of its proper divisors (16858542).

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

13720146 is a wasteful number, since it uses less digits than its factorization.

13720146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 13720146 is about 3704.0715435855. The cubic root of 13720146 is about 239.3974817035.

Adding to 13720146 its reverse (64102731), we get a palindrome (77822877).

The spelling of 13720146 in words is "thirteen million, seven hundred twenty thousand, one hundred forty-six".