12139392 has 64 divisors (see below), whose sum is σ = 32668560. Its totient is φ = 3993600.

The previous prime is 12139381. The next prime is 12139409. The reversal of 12139392 is 29393121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 38628 + ... + 38940.

Almost surely, 2^12139392 is an apocalyptic number.

12139392 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 12139392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16334280).

12139392 is an abundant number, since it is smaller than the sum of its proper divisors (20529168).

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

12139392 is a wasteful number, since it uses less digits than its factorization.

12139392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 419 counting only the distinct ones).

The product of its digits is 2916, while the sum is 30.

The square root of 12139392 is about 3484.1630271846. The cubic root of 12139392 is about 229.8259048013.

The spelling of 12139392 in words is "twelve million, one hundred thirty-nine thousand, three hundred ninety-two".