142670681 has 8 divisors (see below), whose sum is σ = 152560584. Its totient is φ = 132947200.

The previous prime is 142670669. The next prime is 142670683. The reversal of 142670681 is 186076241.

It can be written as a sum of positive squares in 4 ways, for example, as 74046025 + 68624656 = 8605^2 + 8284^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142670681 - 2¹⁴ = 142654297 is a prime.

It is a super-2 number, since 2×142670681² = 40709846434007522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142670683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39830 + ... + 43263.

It is an arithmetic number, because the mean of its divisors is an integer number (19070073).

Almost surely, 2^142670681 is an apocalyptic number.

It is an amenable number.

142670681 is a deficient number, since it is larger than the sum of its proper divisors (9889903).

142670681 is a wasteful number, since it uses less digits than its factorization.

142670681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83211.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 142670681 is about 11944.4832872753. The cubic root of 142670681 is about 522.5304192358.

The spelling of 142670681 in words is "one hundred forty-two million, six hundred seventy thousand, six hundred eighty-one".