142135547 has 4 divisors (see below), whose sum is σ = 142163736. Its totient is φ = 142107360.

The previous prime is 142135531. The next prime is 142135579. The reversal of 142135547 is 745531241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142135547 - 2⁴ = 142135531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142135507) 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, 4229 + ... + 17382.

It is an arithmetic number, because the mean of its divisors is an integer number (35540934).

Almost surely, 2^142135547 is an apocalyptic number.

142135547 is a deficient number, since it is larger than the sum of its proper divisors (28189).

142135547 is an equidigital number, since it uses as much as digits as its factorization.

142135547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28188.

The product of its digits is 16800, while the sum is 32.

The square root of 142135547 is about 11922.0613569970. The cubic root of 142135547 is about 521.8762924753.

Adding to 142135547 its reverse (745531241), we get a palindrome (887666788).

The spelling of 142135547 in words is "one hundred forty-two million, one hundred thirty-five thousand, five hundred forty-seven".