142181023987 has 4 divisors (see below), whose sum is σ = 142318663960. Its totient is φ = 142043384016.

The previous prime is 142181023969. The next prime is 142181024003. The reversal of 142181023987 is 789320181241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142181023987 - 2²³ = 142172635379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142181023967) 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, 68818437 + ... + 68820502.

It is an arithmetic number, because the mean of its divisors is an integer number (35579665990).

Almost surely, 2^142181023987 is an apocalyptic number.

142181023987 is a deficient number, since it is larger than the sum of its proper divisors (137639973).

142181023987 is a wasteful number, since it uses less digits than its factorization.

142181023987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137639972.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 142181023987 in words is "one hundred forty-two billion, one hundred eighty-one million, twenty-three thousand, nine hundred eighty-seven".