13431012 has 48 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 3804192.

The previous prime is 13430993. The next prime is 13431017. The reversal of 13431012 is 21013431.

13431012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13430982 and 13431000.

It is not an unprimeable number, because it can be changed into a prime (13431017) 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, 10039 + ... + 11297.

It is an arithmetic number, because the mean of its divisors is an integer number (752640).

Almost surely, 2^13431012 is an apocalyptic number.

13431012 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 13431012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18063360).

13431012 is an abundant number, since it is smaller than the sum of its proper divisors (22695708).

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

13431012 is a wasteful number, since it uses less digits than its factorization.

13431012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13431012 is about 3664.8345119528. The cubic root of 13431012 is about 237.7038663208.

Adding to 13431012 its reverse (21013431), we get a palindrome (34444443).

The spelling of 13431012 in words is "thirteen million, four hundred thirty-one thousand, twelve".