142247750 has 16 divisors (see below), whose sum is σ = 266288256. Its totient is φ = 56899000.

The previous prime is 142247723. The next prime is 142247753. The reversal of 142247750 is 57742241.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142247753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284246 + ... + 284745.

It is an arithmetic number, because the mean of its divisors is an integer number (16643016).

Almost surely, 2^142247750 is an apocalyptic number.

142247750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142247750 is a deficient number, since it is larger than the sum of its proper divisors (124040506).

142247750 is an equidigital number, since it uses as much as digits as its factorization.

142247750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569008 (or 568998 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 142247750 is about 11926.7661165967. The cubic root of 142247750 is about 522.0135808722.

Adding to 142247750 its reverse (57742241), we get a palindrome (199989991).

The spelling of 142247750 in words is "one hundred forty-two million, two hundred forty-seven thousand, seven hundred fifty".