142634209 has 8 divisors (see below), whose sum is σ = 147692160. Its totient is φ = 137585616.

The previous prime is 142634117. The next prime is 142634213. The reversal of 142634209 is 902436241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142634209 - 2¹³ = 142626017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142634249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45672 + ... + 48694.

It is an arithmetic number, because the mean of its divisors is an integer number (18461520).

Almost surely, 2^142634209 is an apocalyptic number.

It is an amenable number.

142634209 is a deficient number, since it is larger than the sum of its proper divisors (5057951).

142634209 is a wasteful number, since it uses less digits than its factorization.

142634209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 142634209 is about 11942.9564597716. The cubic root of 142634209 is about 522.4858892887.

The spelling of 142634209 in words is "one hundred forty-two million, six hundred thirty-four thousand, two hundred nine".