142120001 has 2 divisors, whose sum is σ = 142120002. Its totient is φ = 142120000.

The previous prime is 142119961. The next prime is 142120003. The reversal of 142120001 is 100021241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113976976 + 28143025 = 10676^2 + 5305^2 .

It is a cyclic number.

It is not a de Polignac number, because 142120001 - 2¹⁴ = 142103617 is a prime.

Together with 142120003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142120003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71060000 + 71060001.

It is an arithmetic number, because the mean of its divisors is an integer number (71060001).

Almost surely, 2^142120001 is an apocalyptic number.

It is an amenable number.

142120001 is a deficient number, since it is larger than the sum of its proper divisors (1).

142120001 is an equidigital number, since it uses as much as digits as its factorization.

142120001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 142120001 is about 11921.4093546023. The cubic root of 142120001 is about 521.8572651341.

Adding to 142120001 its reverse (100021241), we get a palindrome (242141242).

The spelling of 142120001 in words is "one hundred forty-two million, one hundred twenty thousand, one".