142809207 has 4 divisors (see below), whose sum is σ = 190412280. Its totient is φ = 95206136.

The previous prime is 142809203. The next prime is 142809217. The reversal of 142809207 is 702908241.

It is a happy number.

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 142809207 - 2² = 142809203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142809203) 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, 23801532 + ... + 23801537.

It is an arithmetic number, because the mean of its divisors is an integer number (47603070).

Almost surely, 2^142809207 is an apocalyptic number.

142809207 is a deficient number, since it is larger than the sum of its proper divisors (47603073).

142809207 is an equidigital number, since it uses as much as digits as its factorization.

142809207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47603072.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 142809207 is about 11950.2806243201. The cubic root of 142809207 is about 522.6994813816.

The spelling of 142809207 in words is "one hundred forty-two million, eight hundred nine thousand, two hundred seven".