142702121 has 2 divisors, whose sum is σ = 142702122. Its totient is φ = 142702120.

The previous prime is 142702117. The next prime is 142702123. The reversal of 142702121 is 121207241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82810000 + 59892121 = 9100^2 + 7739^2 .

It is a cyclic number.

It is not a de Polignac number, because 142702121 - 2² = 142702117 is a prime.

Together with 142702123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142702093 and 142702102.

It is not a weakly prime, because it can be changed into another prime (142702123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71351060 + 71351061.

It is an arithmetic number, because the mean of its divisors is an integer number (71351061).

Almost surely, 2^142702121 is an apocalyptic number.

It is an amenable number.

142702121 is a deficient number, since it is larger than the sum of its proper divisors (1).

142702121 is an equidigital number, since it uses as much as digits as its factorization.

142702121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 142702121 is about 11945.7993035209. The cubic root of 142702121 is about 522.5687993470.

Adding to 142702121 its reverse (121207241), we get a palindrome (263909362).

The spelling of 142702121 in words is "one hundred forty-two million, seven hundred two thousand, one hundred twenty-one".