142830881 has 4 divisors (see below), whose sum is σ = 142924992. Its totient is φ = 142736772.

The previous prime is 142830871. The next prime is 142830899. The reversal of 142830881 is 188038241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188038241 = 17 ⋅11061073.

It is a cyclic number.

It is not a de Polignac number, because 142830881 - 2²² = 138636577 is a prime.

It is a super-2 number, since 2×142830881² = 40801321134472322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142830871) 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 3 ways as a sum of consecutive naturals, for example, 44741 + ... + 47826.

It is an arithmetic number, because the mean of its divisors is an integer number (35731248).

Almost surely, 2^142830881 is an apocalyptic number.

It is an amenable number.

142830881 is a deficient number, since it is larger than the sum of its proper divisors (94111).

142830881 is an equidigital number, since it uses as much as digits as its factorization.

142830881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94110.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 142830881 is about 11951.1874305443. The cubic root of 142830881 is about 522.7259232236.

The spelling of 142830881 in words is "one hundred forty-two million, eight hundred thirty thousand, eight hundred eighty-one".