142815887 has 2 divisors, whose sum is σ = 142815888. Its totient is φ = 142815886.

The previous prime is 142815851. The next prime is 142815889. The reversal of 142815887 is 788518241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142815887 - 2¹² = 142811791 is a prime.

Together with 142815889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142815889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71407943 + 71407944.

It is an arithmetic number, because the mean of its divisors is an integer number (71407944).

Almost surely, 2^142815887 is an apocalyptic number.

142815887 is a deficient number, since it is larger than the sum of its proper divisors (1).

142815887 is an equidigital number, since it uses as much as digits as its factorization.

142815887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 44.

The square root of 142815887 is about 11950.5601123964. The cubic root of 142815887 is about 522.7076311318.

The spelling of 142815887 in words is "one hundred forty-two million, eight hundred fifteen thousand, eight hundred eighty-seven".