142102321 has 2 divisors, whose sum is σ = 142102322. Its totient is φ = 142102320.

The previous prime is 142102309. The next prime is 142102327. The reversal of 142102321 is 123201241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141871921 + 230400 = 11911^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 142102321 - 2¹³ = 142094129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142102295 and 142102304.

It is not a weakly prime, because it can be changed into another prime (142102327) 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, 71051160 + 71051161.

It is an arithmetic number, because the mean of its divisors is an integer number (71051161).

Almost surely, 2^142102321 is an apocalyptic number.

It is an amenable number.

142102321 is a deficient number, since it is larger than the sum of its proper divisors (1).

142102321 is an equidigital number, since it uses as much as digits as its factorization.

142102321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 142102321 is about 11920.6678084745. The cubic root of 142102321 is about 521.8356242227.

Adding to 142102321 its reverse (123201241), we get a palindrome (265303562).

The spelling of 142102321 in words is "one hundred forty-two million, one hundred two thousand, three hundred twenty-one".