1642222123 has 2 divisors, whose sum is σ = 1642222124. Its totient is φ = 1642222122.

The previous prime is 1642222081. The next prime is 1642222133. The reversal of 1642222123 is 3212222461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642222123 - 2⁹ = 1642221611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642222133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821111061 + 821111062.

It is an arithmetic number, because the mean of its divisors is an integer number (821111062).

Almost surely, 2^1642222123 is an apocalyptic number.

1642222123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642222123 is an equidigital number, since it uses as much as digits as its factorization.

1642222123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 1642222123 is about 40524.3398835811. The cubic root of 1642222123 is about 1179.8060877852.

Adding to 1642222123 its reverse (3212222461), we get a palindrome (4854444584).

The spelling of 1642222123 in words is "one billion, six hundred forty-two million, two hundred twenty-two thousand, one hundred twenty-three".