1342442021 has 2 divisors, whose sum is σ = 1342442022. Its totient is φ = 1342442020.

The previous prime is 1342441993. The next prime is 1342442033. The reversal of 1342442021 is 1202442431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050408100 + 292033921 = 32410^2 + 17089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1342442021 - 2¹⁸ = 1342179877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1342442051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671221010 + 671221011.

It is an arithmetic number, because the mean of its divisors is an integer number (671221011).

Almost surely, 2^1342442021 is an apocalyptic number.

It is an amenable number.

1342442021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1342442021 is an equidigital number, since it uses as much as digits as its factorization.

1342442021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1342442021 is about 36639.3507175004. The cubic root of 1342442021 is about 1103.1430824675.

Adding to 1342442021 its reverse (1202442431), we get a palindrome (2544884452).

The spelling of 1342442021 in words is "one billion, three hundred forty-two million, four hundred forty-two thousand, twenty-one".