142247 has 6 divisors (see below), whose sum is σ = 165528. Its totient is φ = 121884.

The previous prime is 142237. The next prime is 142271. The reversal of 142247 is 742241.

It is not a de Polignac number, because 142247 - 2⁴ = 142231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142247.

It is not an unprimeable number, because it can be changed into a prime (142217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1403 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (27588).

2¹⁴²²⁴⁷ is an apocalyptic number.

142247 is a deficient number, since it is larger than the sum of its proper divisors (23281).

142247 is an equidigital number, since it uses as much as digits as its factorization.

142247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2910 counting only the distinct ones).

The product of its digits is 448, while the sum is 20.

The square root of 142247 is about 377.1564662047. The cubic root of 142247 is about 52.2012663433.

Adding to 142247 its reverse (742241), we get a palindrome (884488).

The spelling of 142247 in words is "one hundred forty-two thousand, two hundred forty-seven", and thus it is an iban number.