13972745 has 4 divisors (see below), whose sum is σ = 16767300. Its totient is φ = 11178192.

The previous prime is 13972741. The next prime is 13972747. The reversal of 13972745 is 54727931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54727931 = 953 ⋅57427.

It can be written as a sum of positive squares in 2 ways, for example, as 1666681 + 12306064 = 1291^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 13972745 - 2² = 13972741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13972699 and 13972708.

It is not an unprimeable number, because it can be changed into a prime (13972741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397270 + ... + 1397279.

It is an arithmetic number, because the mean of its divisors is an integer number (4191825).

Almost surely, 2^13972745 is an apocalyptic number.

It is an amenable number.

13972745 is a deficient number, since it is larger than the sum of its proper divisors (2794555).

13972745 is an equidigital number, since it uses as much as digits as its factorization.

13972745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794554.

The product of its digits is 52920, while the sum is 38.

The square root of 13972745 is about 3738.0135098739. The cubic root of 13972745 is about 240.8577237969.

The spelling of 13972745 in words is "thirteen million, nine hundred seventy-two thousand, seven hundred forty-five".