1142234021 has 2 divisors, whose sum is σ = 1142234022. Its totient is φ = 1142234020.

The previous prime is 1142234011. The next prime is 1142234033. The reversal of 1142234021 is 1204322411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 697488100 + 444745921 = 26410^2 + 21089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142234021 - 2²⁶ = 1075125157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1142233984 and 1142234002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142234011) 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, 571117010 + 571117011.

It is an arithmetic number, because the mean of its divisors is an integer number (571117011).

Almost surely, 2^1142234021 is an apocalyptic number.

It is an amenable number.

1142234021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142234021 is an equidigital number, since it uses as much as digits as its factorization.

1142234021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1142234021 is about 33796.9528360176. The cubic root of 1142234021 is about 1045.3258664905.

Adding to 1142234021 its reverse (1204322411), we get a palindrome (2346556432).

The spelling of 1142234021 in words is "one billion, one hundred forty-two million, two hundred thirty-four thousand, twenty-one".