104640121 has 2 divisors, whose sum is σ = 104640122. Its totient is φ = 104640120.

The previous prime is 104640119. The next prime is 104640139. The reversal of 104640121 is 121046401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98783721 + 5856400 = 9939^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 104640121 - 2¹ = 104640119 is a prime.

Together with 104640119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (104640101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52320060 + 52320061.

It is an arithmetic number, because the mean of its divisors is an integer number (52320061).

Almost surely, 2^104640121 is an apocalyptic number.

It is an amenable number.

104640121 is a deficient number, since it is larger than the sum of its proper divisors (1).

104640121 is an equidigital number, since it uses as much as digits as its factorization.

104640121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 104640121 is about 10229.3753963768. The cubic root of 104640121 is about 471.2297972750.

Adding to 104640121 its reverse (121046401), we get a palindrome (225686522).

The spelling of 104640121 in words is "one hundred four million, six hundred forty thousand, one hundred twenty-one".