142912681 has 2 divisors, whose sum is σ = 142912682. Its totient is φ = 142912680.

The previous prime is 142912673. The next prime is 142912703. The reversal of 142912681 is 186219241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142086400 + 826281 = 11920^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 142912681 - 2³ = 142912673 is a prime.

It is a super-2 number, since 2×142912681² = 40848068781215522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142912631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71456340 + 71456341.

It is an arithmetic number, because the mean of its divisors is an integer number (71456341).

Almost surely, 2^142912681 is an apocalyptic number.

It is an amenable number.

142912681 is a deficient number, since it is larger than the sum of its proper divisors (1).

142912681 is an equidigital number, since it uses as much as digits as its factorization.

142912681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 142912681 is about 11954.6091947834. The cubic root of 142912681 is about 522.8256934789.

The spelling of 142912681 in words is "one hundred forty-two million, nine hundred twelve thousand, six hundred eighty-one".