142784709 has 4 divisors (see below), whose sum is σ = 190379616. Its totient is φ = 95189804.

The previous prime is 142784699. The next prime is 142784743. The reversal of 142784709 is 907487241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142784709 - 2⁴ = 142784693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142784909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23797449 + ... + 23797454.

It is an arithmetic number, because the mean of its divisors is an integer number (47594904).

Almost surely, 2^142784709 is an apocalyptic number.

It is an amenable number.

142784709 is a deficient number, since it is larger than the sum of its proper divisors (47594907).

142784709 is an equidigital number, since it uses as much as digits as its factorization.

142784709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47594906.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 142784709 is about 11949.2555835081. The cubic root of 142784709 is about 522.6695910955.

The spelling of 142784709 in words is "one hundred forty-two million, seven hundred eighty-four thousand, seven hundred nine".