142640427 has 8 divisors (see below), whose sum is σ = 191576016. Its totient is φ = 94399232.

The previous prime is 142640423. The next prime is 142640471. The reversal of 142640427 is 724046241.

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 142640427 - 2² = 142640423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142640394 and 142640403.

It is not an unprimeable number, because it can be changed into a prime (142640423) 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, 173118 + ... + 173939.

It is an arithmetic number, because the mean of its divisors is an integer number (23947002).

Almost surely, 2^142640427 is an apocalyptic number.

142640427 is a deficient number, since it is larger than the sum of its proper divisors (48935589).

142640427 is a wasteful number, since it uses less digits than its factorization.

142640427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347197.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 142640427 is about 11943.2167777362. The cubic root of 142640427 is about 522.4934816003.

Adding to 142640427 its reverse (724046241), we get a palindrome (866686668).

The spelling of 142640427 in words is "one hundred forty-two million, six hundred forty thousand, four hundred twenty-seven".