1142421421 has 2 divisors, whose sum is σ = 1142421422. Its totient is φ = 1142421420.

The previous prime is 1142421391. The next prime is 1142421439. The reversal of 1142421421 is 1241242411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128019396 + 14402025 = 33586^2 + 3795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142421421 - 2¹³ = 1142413229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1142421392 and 1142421401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142421461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571210710 + 571210711.

It is an arithmetic number, because the mean of its divisors is an integer number (571210711).

Almost surely, 2^1142421421 is an apocalyptic number.

It is an amenable number.

1142421421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142421421 is an equidigital number, since it uses as much as digits as its factorization.

1142421421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 22.

The square root of 1142421421 is about 33799.7251616045. The cubic root of 1142421421 is about 1045.3830303033.

Adding to 1142421421 its reverse (1241242411), we get a palindrome (2383663832).

The spelling of 1142421421 in words is "one billion, one hundred forty-two million, four hundred twenty-one thousand, four hundred twenty-one".