13722012 has 18 divisors (see below), whose sum is σ = 34686288. Its totient is φ = 4573992.

The previous prime is 13721993. The next prime is 13722019. The reversal of 13722012 is 21022731.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×13722012² = 376587226656288, 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 (13722019) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 190548 + ... + 190619.

It is an arithmetic number, because the mean of its divisors is an integer number (1927016).

Almost surely, 2^13722012 is an apocalyptic number.

13722012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13722012 is an abundant number, since it is smaller than the sum of its proper divisors (20964276).

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

13722012 is a wasteful number, since it uses less digits than its factorization.

13722012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381177 (or 381172 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 13722012 is about 3704.3234200053. The cubic root of 13722012 is about 239.4083342471.

Adding to 13722012 its reverse (21022731), we get a palindrome (34744743).

The spelling of 13722012 in words is "thirteen million, seven hundred twenty-two thousand, twelve".