142810681 has 4 divisors (see below), whose sum is σ = 153796132. Its totient is φ = 131825232.

The previous prime is 142810649. The next prime is 142810687. The reversal of 142810681 is 186018241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186018241 = 239 ⋅778319.

It can be written as a sum of positive squares in 2 ways, for example, as 44622400 + 98188281 = 6680^2 + 9909^2 .

It is a cyclic number.

It is not a de Polignac number, because 142810681 - 2⁵ = 142810649 is a prime.

It is a super-2 number, since 2×142810681² = 40789781215367522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142810687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5492706 + ... + 5492731.

It is an arithmetic number, because the mean of its divisors is an integer number (38449033).

Almost surely, 2^142810681 is an apocalyptic number.

It is an amenable number.

142810681 is a deficient number, since it is larger than the sum of its proper divisors (10985451).

142810681 is a wasteful number, since it uses less digits than its factorization.

142810681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10985450.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 142810681 is about 11950.3422963529. The cubic root of 142810681 is about 522.7012797166.

The spelling of 142810681 in words is "one hundred forty-two million, eight hundred ten thousand, six hundred eighty-one".