13720045 has 8 divisors (see below), whose sum is σ = 17031960. Its totient is φ = 10597440.

The previous prime is 13720039. The next prime is 13720061. The reversal of 13720045 is 54002731.

It can be written as a sum of positive squares in 4 ways, for example, as 81796 + 13638249 = 286^2 + 3693^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13720045 - 2¹⁷ = 13588973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13719998 and 13720025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47166 + ... + 47455.

It is an arithmetic number, because the mean of its divisors is an integer number (2128995).

Almost surely, 2^13720045 is an apocalyptic number.

It is an amenable number.

13720045 is a deficient number, since it is larger than the sum of its proper divisors (3311915).

13720045 is an equidigital number, since it uses as much as digits as its factorization.

13720045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94655.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 13720045 is about 3704.0579099145. The cubic root of 13720045 is about 239.3968942655.

Adding to 13720045 its reverse (54002731), we get a palindrome (67722776).

The spelling of 13720045 in words is "thirteen million, seven hundred twenty thousand, forty-five".