1423342121 has 2 divisors, whose sum is σ = 1423342122. Its totient is φ = 1423342120.

The previous prime is 1423342093. The next prime is 1423342163. The reversal of 1423342121 is 1212433241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062760000 + 360582121 = 32600^2 + 18989^2 .

It is an emirp because it is prime and its reverse (1212433241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1423342121 - 2⁶ = 1423342057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1423342181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711671060 + 711671061.

It is an arithmetic number, because the mean of its divisors is an integer number (711671061).

Almost surely, 2^1423342121 is an apocalyptic number.

It is an amenable number.

1423342121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423342121 is an equidigital number, since it uses as much as digits as its factorization.

1423342121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 1423342121 is about 37727.2066418917. The cubic root of 1423342121 is about 1124.8719843799.

Adding to 1423342121 its reverse (1212433241), we get a palindrome (2635775362).

The spelling of 1423342121 in words is "one billion, four hundred twenty-three million, three hundred forty-two thousand, one hundred twenty-one".