13745971 has 4 divisors (see below), whose sum is σ = 14220000. Its totient is φ = 13271944.

The previous prime is 13745959. The next prime is 13745993. The reversal of 13745971 is 17954731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17954731 = 37 ⋅485263.

It is a cyclic number.

It is not a de Polignac number, because 13745971 - 2¹¹ = 13743923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13745971.

It is not an unprimeable number, because it can be changed into a prime (13745371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236971 + ... + 237028.

It is an arithmetic number, because the mean of its divisors is an integer number (3555000).

Almost surely, 2^13745971 is an apocalyptic number.

13745971 is a deficient number, since it is larger than the sum of its proper divisors (474029).

13745971 is an equidigital number, since it uses as much as digits as its factorization.

13745971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474028.

The product of its digits is 26460, while the sum is 37.

The square root of 13745971 is about 3707.5559334958. Note that the first 3 decimals coincide. The cubic root of 13745971 is about 239.5475910150.

The spelling of 13745971 in words is "thirteen million, seven hundred forty-five thousand, nine hundred seventy-one".