16121712 has 80 divisors (see below), whose sum is σ = 46068480. Its totient is φ = 4832256.

The previous prime is 16121711. The next prime is 16121713. The reversal of 16121712 is 21712161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16121711) and next prime (16121713).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18339 + ... + 19197.

It is an arithmetic number, because the mean of its divisors is an integer number (575856).

Almost surely, 2^16121712 is an apocalyptic number.

16121712 is a gapful number since it is divisible by the number (12) 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 16121712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23034240).

16121712 is an abundant number, since it is smaller than the sum of its proper divisors (29946768).

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

16121712 is a wasteful number, since it uses less digits than its factorization.

16121712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910 (or 904 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 16121712 is about 4015.1851763026. The cubic root of 16121712 is about 252.6215445941.

Adding to 16121712 its reverse (21712161), we get a palindrome (37833873).

The spelling of 16121712 in words is "sixteen million, one hundred twenty-one thousand, seven hundred twelve".