142784447 has 8 divisors (see below), whose sum is σ = 154460544. Its totient is φ = 131207328.

The previous prime is 142784417. The next prime is 142784459. The reversal of 142784447 is 744487241.

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 142784447 - 2¹⁴ = 142768063 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 (142784417) 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, 21728 + ... + 27525.

It is an arithmetic number, because the mean of its divisors is an integer number (19307568).

Almost surely, 2^142784447 is an apocalyptic number.

142784447 is a deficient number, since it is larger than the sum of its proper divisors (11676097).

142784447 is a wasteful number, since it uses less digits than its factorization.

142784447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49489.

The product of its digits is 200704, while the sum is 41.

The square root of 142784447 is about 11949.2446204771. The cubic root of 142784447 is about 522.6692714079.

The spelling of 142784447 in words is "one hundred forty-two million, seven hundred eighty-four thousand, four hundred forty-seven".