142052021 has 2 divisors, whose sum is σ = 142052022. Its totient is φ = 142052020.

The previous prime is 142051969. The next prime is 142052039. The reversal of 142052021 is 120250241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131560900 + 10491121 = 11470^2 + 3239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142052021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142052921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71026010 + 71026011.

It is an arithmetic number, because the mean of its divisors is an integer number (71026011).

Almost surely, 2^142052021 is an apocalyptic number.

It is an amenable number.

142052021 is a deficient number, since it is larger than the sum of its proper divisors (1).

142052021 is an equidigital number, since it uses as much as digits as its factorization.

142052021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 142052021 is about 11918.5578406114. The cubic root of 142052021 is about 521.7740455204.

The spelling of 142052021 in words is "one hundred forty-two million, fifty-two thousand, twenty-one".