12431016 has 128 divisors (see below), whose sum is σ = 39312000. Its totient is φ = 3608064.

The previous prime is 12430963. The next prime is 12431033. The reversal of 12431016 is 61013421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 12431016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53236 + ... + 53468.

It is an arithmetic number, because the mean of its divisors is an integer number (307125).

Almost surely, 2^12431016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12431016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19656000).

12431016 is an abundant number, since it is smaller than the sum of its proper divisors (26880984).

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

12431016 is a wasteful number, since it uses less digits than its factorization.

12431016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12431016 is about 3525.7645979277. The cubic root of 12431016 is about 231.6517267479.

Adding to 12431016 its reverse (61013421), we get a palindrome (73444437).

The spelling of 12431016 in words is "twelve million, four hundred thirty-one thousand, sixteen".