142605121 has 2 divisors, whose sum is σ = 142605122. Its totient is φ = 142605120.

The previous prime is 142605107. The next prime is 142605143. The reversal of 142605121 is 121506241.

It is an a-pointer prime, because the next prime (142605143) can be obtained adding 142605121 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141729025 + 876096 = 11905^2 + 936^2 .

It is an emirp because it is prime and its reverse (121506241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142605121 - 2¹⁷ = 142474049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142605092 and 142605101.

It is not a weakly prime, because it can be changed into another prime (142605101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71302560 + 71302561.

It is an arithmetic number, because the mean of its divisors is an integer number (71302561).

Almost surely, 2^142605121 is an apocalyptic number.

It is an amenable number.

142605121 is a deficient number, since it is larger than the sum of its proper divisors (1).

142605121 is an equidigital number, since it uses as much as digits as its factorization.

142605121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 142605121 is about 11941.7386087621. The cubic root of 142605121 is about 522.4503692853.

The spelling of 142605121 in words is "one hundred forty-two million, six hundred five thousand, one hundred twenty-one".