142033981 has 2 divisors, whose sum is σ = 142033982. Its totient is φ = 142033980.

The previous prime is 142033961. The next prime is 142034003. The reversal of 142033981 is 189330241.

142033981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137686756 + 4347225 = 11734^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 142033981 - 2¹¹ = 142031933 is a prime.

It is a super-2 number, since 2×142033981² = 40347303517416722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142033921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71016990 + 71016991.

It is an arithmetic number, because the mean of its divisors is an integer number (71016991).

Almost surely, 2^142033981 is an apocalyptic number.

It is an amenable number.

142033981 is a deficient number, since it is larger than the sum of its proper divisors (1).

142033981 is an equidigital number, since it uses as much as digits as its factorization.

142033981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 142033981 is about 11917.8010136099. The cubic root of 142033981 is about 521.7519568935.

The spelling of 142033981 in words is "one hundred forty-two million, thirty-three thousand, nine hundred eighty-one".