12971016 has 80 divisors (see below), whose sum is σ = 37381740. Its totient is φ = 4199040.

The previous prime is 12971009. The next prime is 12971039. The reversal of 12971016 is 61017921.

It can be written as a sum of positive squares in 2 ways, for example, as 12574116 + 396900 = 3546^2 + 630^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23706 + ... + 24246.

Almost surely, 2^12971016 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 12971016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18690870).

12971016 is an abundant number, since it is smaller than the sum of its proper divisors (24410724).

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

12971016 is a wasteful number, since it uses less digits than its factorization.

12971016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 12971016 is about 3601.5296750131. The cubic root of 12971016 is about 234.9585923723.

Adding to 12971016 its reverse (61017921), we get a palindrome (73988937).

The spelling of 12971016 in words is "twelve million, nine hundred seventy-one thousand, sixteen".