19342121 has 2 divisors, whose sum is σ = 19342122. Its totient is φ = 19342120.

The previous prime is 19342117. The next prime is 19342129. The reversal of 19342121 is 12124391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 9388096 = 3155^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 19342121 - 2² = 19342117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19342129) 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, 9671060 + 9671061.

It is an arithmetic number, because the mean of its divisors is an integer number (9671061).

Almost surely, 2^19342121 is an apocalyptic number.

It is an amenable number.

19342121 is a deficient number, since it is larger than the sum of its proper divisors (1).

19342121 is an equidigital number, since it uses as much as digits as its factorization.

19342121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 19342121 is about 4397.9678261670. The cubic root of 19342121 is about 268.4322542922.

It can be divided in two parts, 1934 and 2121, that multiplied together give a palindrome (4102014).

The spelling of 19342121 in words is "nineteen million, three hundred forty-two thousand, one hundred twenty-one".