142109887 has 2 divisors, whose sum is σ = 142109888. Its totient is φ = 142109886.

The previous prime is 142109839. The next prime is 142109897. The reversal of 142109887 is 788901241.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (788901241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142109887 - 2¹¹ = 142107839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142109827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71054943 + 71054944.

It is an arithmetic number, because the mean of its divisors is an integer number (71054944).

Almost surely, 2^142109887 is an apocalyptic number.

142109887 is a deficient number, since it is larger than the sum of its proper divisors (1).

142109887 is an equidigital number, since it uses as much as digits as its factorization.

142109887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 142109887 is about 11920.9851522431. The cubic root of 142109887 is about 521.8448854795.

The spelling of 142109887 in words is "one hundred forty-two million, one hundred nine thousand, eight hundred eighty-seven".