12139456 has 70 divisors (see below), whose sum is σ = 28458160. Its totient is φ = 5136768.

The previous prime is 12139447. The next prime is 12139483. The reversal of 12139456 is 65493121.

12139456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 153625 + ... + 153703.

Almost surely, 2^12139456 is an apocalyptic number.

12139456 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 12139456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14229080).

12139456 is an abundant number, since it is smaller than the sum of its proper divisors (16318704).

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

12139456 is an frugal number, since it uses more digits than its factorization.

12139456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 88 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 12139456 is about 3484.1722115877. The cubic root of 12139456 is about 229.8263086884.

The spelling of 12139456 in words is "twelve million, one hundred thirty-nine thousand, four hundred fifty-six".