142145387 has 2 divisors, whose sum is σ = 142145388. Its totient is φ = 142145386.

The previous prime is 142145383. The next prime is 142145389. The reversal of 142145387 is 783541241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142145387 - 2² = 142145383 is a prime.

It is a super-2 number, since 2×142145387² = 40410622090759538, which contains 22 as substring.

Together with 142145389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142145383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71072693 + 71072694.

It is an arithmetic number, because the mean of its divisors is an integer number (71072694).

Almost surely, 2^142145387 is an apocalyptic number.

142145387 is a deficient number, since it is larger than the sum of its proper divisors (1).

142145387 is an equidigital number, since it uses as much as digits as its factorization.

142145387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 35.

The square root of 142145387 is about 11922.4740301667. The cubic root of 142145387 is about 521.8883353089. Note that the first 3 decimals are identical.

The spelling of 142145387 in words is "one hundred forty-two million, one hundred forty-five thousand, three hundred eighty-seven".