12781932 has 48 divisors (see below), whose sum is σ = 30868992. Its totient is φ = 4114240.

The previous prime is 12781931. The next prime is 12781939. The reversal of 12781932 is 23918721.

It is a junction number, because it is equal to n+sod(n) for n = 12781893 and 12781902.

It is not an unprimeable number, because it can be changed into a prime (12781931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73798 + ... + 73970.

It is an arithmetic number, because the mean of its divisors is an integer number (643104).

Almost surely, 2^12781932 is an apocalyptic number.

12781932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12781932 is an abundant number, since it is smaller than the sum of its proper divisors (18087060).

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

12781932 is a wasteful number, since it uses less digits than its factorization.

12781932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 356 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 12781932 is about 3575.1827925296. The cubic root of 12781932 is about 233.8113023275.

The spelling of 12781932 in words is "twelve million, seven hundred eighty-one thousand, nine hundred thirty-two".