13139412 has 144 divisors (see below), whose sum is σ = 39352320. Its totient is φ = 3369600.

The previous prime is 13139411. The next prime is 13139429. The reversal of 13139412 is 21493131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 423837 + ... + 423867.

It is an arithmetic number, because the mean of its divisors is an integer number (273280).

Almost surely, 2^13139412 is an apocalyptic number.

13139412 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 13139412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19676160).

13139412 is an abundant number, since it is smaller than the sum of its proper divisors (26212908).

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

13139412 is a wasteful number, since it uses less digits than its factorization.

13139412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 79 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 13139412 is about 3624.8326857939. The cubic root of 13139412 is about 235.9710057265.

The spelling of 13139412 in words is "thirteen million, one hundred thirty-nine thousand, four hundred twelve".