142205087 has 4 divisors (see below), whose sum is σ = 142256136. Its totient is φ = 142154040.

The previous prime is 142205081. The next prime is 142205099. The reversal of 142205087 is 780502241.

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 142205087 - 2²⁰ = 141156511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142205081) 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, 21089 + ... + 27002.

It is an arithmetic number, because the mean of its divisors is an integer number (35564034).

Almost surely, 2^142205087 is an apocalyptic number.

142205087 is a deficient number, since it is larger than the sum of its proper divisors (51049).

142205087 is an equidigital number, since it uses as much as digits as its factorization.

142205087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51048.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 142205087 is about 11924.9774423267. The cubic root of 142205087 is about 521.9613881492.

The spelling of 142205087 in words is "one hundred forty-two million, two hundred five thousand, eighty-seven".