142691135 has 4 divisors (see below), whose sum is σ = 171229368. Its totient is φ = 114152904.

The previous prime is 142691113. The next prime is 142691161. The reversal of 142691135 is 531196241.

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 142691135 - 2⁸ = 142690879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14269109 + ... + 14269118.

It is an arithmetic number, because the mean of its divisors is an integer number (42807342).

Almost surely, 2^142691135 is an apocalyptic number.

142691135 is a deficient number, since it is larger than the sum of its proper divisors (28538233).

142691135 is an equidigital number, since it uses as much as digits as its factorization.

142691135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28538232.

The product of its digits is 6480, while the sum is 32.

The square root of 142691135 is about 11945.3394677590. The cubic root of 142691135 is about 522.5553889222. Note that the first 3 decimals are identical.

The spelling of 142691135 in words is "one hundred forty-two million, six hundred ninety-one thousand, one hundred thirty-five".