142061021 has 2 divisors, whose sum is σ = 142061022. Its totient is φ = 142061020.

The previous prime is 142060991. The next prime is 142061047. The reversal of 142061021 is 120160241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92428996 + 49632025 = 9614^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 142061021 - 2¹⁰ = 142059997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142061071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71030510 + 71030511.

It is an arithmetic number, because the mean of its divisors is an integer number (71030511).

Almost surely, 2^142061021 is an apocalyptic number.

It is an amenable number.

142061021 is a deficient number, since it is larger than the sum of its proper divisors (1).

142061021 is an equidigital number, since it uses as much as digits as its factorization.

142061021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 142061021 is about 11918.9353970898. The cubic root of 142061021 is about 521.7850646461.

The spelling of 142061021 in words is "one hundred forty-two million, sixty-one thousand, twenty-one".