142000087 has 4 divisors (see below), whose sum is σ = 142462936. Its totient is φ = 141537240.

The previous prime is 142000081. The next prime is 142000109. The reversal of 142000087 is 780000241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780000241 = 113 ⋅6902657.

It is a cyclic number.

It is not a de Polignac number, because 142000087 - 2⁷ = 141999959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142000081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230964 + ... + 231577.

It is an arithmetic number, because the mean of its divisors is an integer number (35615734).

Almost surely, 2^142000087 is an apocalyptic number.

142000087 is a deficient number, since it is larger than the sum of its proper divisors (462849).

142000087 is an equidigital number, since it uses as much as digits as its factorization.

142000087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462848.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 142000087 is about 11916.3789382513. The cubic root of 142000087 is about 521.7104511741.

The spelling of 142000087 in words is "one hundred forty-two million, eighty-seven", and thus it is an aban number.