13945971 has 16 divisors (see below), whose sum is σ = 20101536. Its totient is φ = 8549376.

The previous prime is 13945969. The next prime is 13945973. The reversal of 13945971 is 17954931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13945969) and next prime (13945973).

It is not a de Polignac number, because 13945971 - 2¹ = 13945969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (13945973) 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 15 ways as a sum of consecutive naturals, for example, 13261 + ... + 14273.

It is an arithmetic number, because the mean of its divisors is an integer number (1256346).

Almost surely, 2^13945971 is an apocalyptic number.

13945971 is a deficient number, since it is larger than the sum of its proper divisors (6155565).

13945971 is a wasteful number, since it uses less digits than its factorization.

13945971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382.

The product of its digits is 34020, while the sum is 39.

The square root of 13945971 is about 3734.4304786674. The cubic root of 13945971 is about 240.7037848723.

The spelling of 13945971 in words is "thirteen million, nine hundred forty-five thousand, nine hundred seventy-one".