13971015 has 32 divisors (see below), whose sum is σ = 25517760. Its totient is φ = 7247232.

The previous prime is 13970989. The next prime is 13971017. The reversal of 13971015 is 51017931.

It is a happy number.

It is not a de Polignac number, because 13971015 - 2⁶ = 13970951 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13971015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13971017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3597 + ... + 6393.

It is an arithmetic number, because the mean of its divisors is an integer number (797430).

Almost surely, 2^13971015 is an apocalyptic number.

13971015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13971015 is a deficient number, since it is larger than the sum of its proper divisors (11546745).

13971015 is a wasteful number, since it uses less digits than its factorization.

13971015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 13971015 is about 3737.7820963775. The cubic root of 13971015 is about 240.8477829904.

Adding to 13971015 its reverse (51017931), we get a palindrome (64988946).

The spelling of 13971015 in words is "thirteen million, nine hundred seventy-one thousand, fifteen".