13845121 has 2 divisors, whose sum is σ = 13845122. Its totient is φ = 13845120.

The previous prime is 13845061. The next prime is 13845131. The reversal of 13845121 is 12154831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 3027600 = 3289^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 13845121 - 2¹⁹ = 13320833 is a prime.

It is not a weakly prime, because it can be changed into another prime (13845131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6922560 + 6922561.

It is an arithmetic number, because the mean of its divisors is an integer number (6922561).

Almost surely, 2^13845121 is an apocalyptic number.

It is an amenable number.

13845121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13845121 is an equidigital number, since it uses as much as digits as its factorization.

13845121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 13845121 is about 3720.9032505562. The cubic root of 13845121 is about 240.1221658133.

Adding to 13845121 its reverse (12154831), we get a palindrome (25999952).

The spelling of 13845121 in words is "thirteen million, eight hundred forty-five thousand, one hundred twenty-one".