142931807 has 8 divisors (see below), whose sum is σ = 150368400. Its totient is φ = 135662464.

The previous prime is 142931791. The next prime is 142931843. The reversal of 142931807 is 708139241.

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

It is not a de Polignac number, because 142931807 - 2⁴ = 142931791 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 (142931857) 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, 40058 + ... + 43479.

It is an arithmetic number, because the mean of its divisors is an integer number (18796050).

Almost surely, 2^142931807 is an apocalyptic number.

142931807 is a deficient number, since it is larger than the sum of its proper divisors (7436593).

142931807 is an equidigital number, since it uses as much as digits as its factorization.

142931807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83625.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 142931807 is about 11955.4091105240. The cubic root of 142931807 is about 522.8490156877.

The spelling of 142931807 in words is "one hundred forty-two million, nine hundred thirty-one thousand, eight hundred seven".