12139776 has 108 divisors (see below), whose sum is σ = 38263680. Its totient is φ = 3671040.

The previous prime is 12139759. The next prime is 12139789. The reversal of 12139776 is 67793121.

It is a happy number.

It is a super-2 number, since 2×12139776² = 294748322660352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12139776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25105 + ... + 25583.

Almost surely, 2^12139776 is an apocalyptic number.

12139776 is a gapful number since it is divisible by the number (16) 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 12139776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19131840).

12139776 is an abundant number, since it is smaller than the sum of its proper divisors (26123904).

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

12139776 is a wasteful number, since it uses less digits than its factorization.

12139776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 495 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 12139776 is about 3484.2181332402. The cubic root of 12139776 is about 229.8283281027.

The spelling of 12139776 in words is "twelve million, one hundred thirty-nine thousand, seven hundred seventy-six".