13707121 has 2 divisors, whose sum is σ = 13707122. Its totient is φ = 13707120.

The previous prime is 13707119. The next prime is 13707139. The reversal of 13707121 is 12170731.

13707121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10336225 + 3370896 = 3215^2 + 1836^2 .

It is a cyclic number.

It is not a de Polignac number, because 13707121 - 2¹ = 13707119 is a prime.

It is a super-2 number, since 2×13707121² = 375770332217282, which contains 22 as substring.

Together with 13707119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13707092 and 13707101.

It is not a weakly prime, because it can be changed into another prime (13707181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6853560 + 6853561.

It is an arithmetic number, because the mean of its divisors is an integer number (6853561).

Almost surely, 2^13707121 is an apocalyptic number.

It is an amenable number.

13707121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13707121 is an equidigital number, since it uses as much as digits as its factorization.

13707121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 13707121 is about 3702.3129257263. The cubic root of 13707121 is about 239.3217016682.

Adding to 13707121 its reverse (12170731), we get a palindrome (25877852).

The spelling of 13707121 in words is "thirteen million, seven hundred seven thousand, one hundred twenty-one".