13971186 has 12 divisors (see below), whose sum is σ = 30270942. Its totient is φ = 4657056.

The previous prime is 13971157. The next prime is 13971197. The reversal of 13971186 is 68117931.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 6922161 = 2655^2 + 2631^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13971186.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388071 + ... + 388106.

Almost surely, 2^13971186 is an apocalyptic number.

13971186 is an abundant number, since it is smaller than the sum of its proper divisors (16299756).

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

13971186 is a wasteful number, since it uses less digits than its factorization.

13971186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776185 (or 776182 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 13971186 is about 3737.8049708352. The cubic root of 13971186 is about 240.8487656154.

It can be divided in two parts, 1397118 and 6, that added together give a square (1397124 = 1182²).

The spelling of 13971186 in words is "thirteen million, nine hundred seventy-one thousand, one hundred eighty-six".