19120001 has 2 divisors, whose sum is σ = 19120002. Its totient is φ = 19120000.

The previous prime is 19119979. The next prime is 19120021. The reversal of 19120001 is 10002191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17631601 + 1488400 = 4199^2 + 1220^2 .

It is an emirp because it is prime and its reverse (10002191) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19120001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9560000 + 9560001.

It is an arithmetic number, because the mean of its divisors is an integer number (9560001).

Almost surely, 2^19120001 is an apocalyptic number.

It is an amenable number.

19120001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19120001 is an equidigital number, since it uses as much as digits as its factorization.

19120001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 19120001 is about 4372.6423361624. The cubic root of 19120001 is about 267.4007597634.

Adding to 19120001 its reverse (10002191), we get a palindrome (29122192).

The spelling of 19120001 in words is "nineteen million, one hundred twenty thousand, one".