19104121 has 2 divisors, whose sum is σ = 19104122. Its totient is φ = 19104120.

The previous prime is 19104109. The next prime is 19104157. The reversal of 19104121 is 12140191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 9369721 = 3120^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 19104121 - 2¹¹ = 19102073 is a prime.

It is not a weakly prime, because it can be changed into another prime (19104161) 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 as a sum of consecutive naturals, namely, 9552060 + 9552061.

It is an arithmetic number, because the mean of its divisors is an integer number (9552061).

Almost surely, 2^19104121 is an apocalyptic number.

It is an amenable number.

19104121 is a deficient number, since it is larger than the sum of its proper divisors (1).

19104121 is an equidigital number, since it uses as much as digits as its factorization.

19104121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 19104121 is about 4370.8261232861. The cubic root of 19104121 is about 267.3267099033.

The spelling of 19104121 in words is "nineteen million, one hundred four thousand, one hundred twenty-one".