142033987 has 4 divisors (see below), whose sum is σ = 149509480. Its totient is φ = 134558496.

The previous prime is 142033981. The next prime is 142034003. The reversal of 142033987 is 789330241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789330241 = 7 ⋅112761463.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142033987 is a prime.

It is a super-3 number, since 3×142033987³ (a number of 25 digits) contains 333 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (142033981) 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, 3737718 + ... + 3737755.

It is an arithmetic number, because the mean of its divisors is an integer number (37377370).

Almost surely, 2^142033987 is an apocalyptic number.

142033987 is a deficient number, since it is larger than the sum of its proper divisors (7475493).

142033987 is an equidigital number, since it uses as much as digits as its factorization.

142033987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7475492.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 142033987 is about 11917.8012653341. The cubic root of 142033987 is about 521.7519642404.

The spelling of 142033987 in words is "one hundred forty-two million, thirty-three thousand, nine hundred eighty-seven".