142707681 has 6 divisors (see below), whose sum is σ = 206133330. Its totient is φ = 95138448.

The previous prime is 142707659. The next prime is 142707703. The reversal of 142707681 is 186707241.

It is an interprime number because it is at equal distance from previous prime (142707659) and next prime (142707703).

It can be written as a sum of positive squares in only one way, i.e., 132365025 + 10342656 = 11505^2 + 3216^2 .

It is not a de Polignac number, because 142707681 - 2⁷ = 142707553 is a prime.

It is a super-2 number, since 2×142707681² = 40730964432795522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142707611) 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 in 5 ways as a sum of consecutive naturals, for example, 7928196 + ... + 7928213.

It is an arithmetic number, because the mean of its divisors is an integer number (34355555).

Almost surely, 2^142707681 is an apocalyptic number.

It is an amenable number.

142707681 is a deficient number, since it is larger than the sum of its proper divisors (63425649).

142707681 is a wasteful number, since it uses less digits than its factorization.

142707681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15856415 (or 15856412 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 142707681 is about 11946.0320190430. The cubic root of 142707681 is about 522.5755860828.

The spelling of 142707681 in words is "one hundred forty-two million, seven hundred seven thousand, six hundred eighty-one".