142206905 has 8 divisors (see below), whose sum is σ = 171696192. Its totient is φ = 113066928.

The previous prime is 142206893. The next prime is 142206917. The reversal of 142206905 is 509602241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (142206893) and next prime (142206917).

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 142206905 - 2²⁶ = 75098041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 86429 + ... + 88058.

It is an arithmetic number, because the mean of its divisors is an integer number (21462024).

Almost surely, 2^142206905 is an apocalyptic number.

It is an amenable number.

142206905 is a deficient number, since it is larger than the sum of its proper divisors (29489287).

142206905 is a wasteful number, since it uses less digits than its factorization.

142206905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174655.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 142206905 is about 11925.0536686423. The cubic root of 142206905 is about 521.9636124526.

The spelling of 142206905 in words is "one hundred forty-two million, two hundred six thousand, nine hundred five".