142061681 has 2 divisors, whose sum is σ = 142061682. Its totient is φ = 142061680.

The previous prime is 142061669. The next prime is 142061687. The reversal of 142061681 is 186160241.

142061681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127690000 + 14371681 = 11300^2 + 3791^2 .

It is a cyclic number.

It is not a de Polignac number, because 142061681 - 2¹⁰ = 142060657 is a prime.

It is a super-2 number, since 2×142061681² = 40363042417091522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142061687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71030840 + 71030841.

It is an arithmetic number, because the mean of its divisors is an integer number (71030841).

Almost surely, 2^142061681 is an apocalyptic number.

It is an amenable number.

142061681 is a deficient number, since it is larger than the sum of its proper divisors (1).

142061681 is an equidigital number, since it uses as much as digits as its factorization.

142061681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 142061681 is about 11918.9630840942. The cubic root of 142061681 is about 521.7858726970.

The spelling of 142061681 in words is "one hundred forty-two million, sixty-one thousand, six hundred eighty-one".