142941987 has 12 divisors (see below), whose sum is σ = 215449104. Its totient is φ = 91151280.

The previous prime is 142941947. The next prime is 142942067. The reversal of 142941987 is 789149241.

It is a happy number.

It is not a de Polignac number, because 142941987 - 2⁶ = 142941923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142941907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345064 + ... + 345477.

It is an arithmetic number, because the mean of its divisors is an integer number (17954092).

Almost surely, 2^142941987 is an apocalyptic number.

142941987 is a deficient number, since it is larger than the sum of its proper divisors (72507117).

142941987 is a wasteful number, since it uses less digits than its factorization.

142941987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690570 (or 690567 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 142941987 is about 11955.8348516530. The cubic root of 142941987 is about 522.8614283123.

The spelling of 142941987 in words is "one hundred forty-two million, nine hundred forty-one thousand, nine hundred eighty-seven".