142224730 has 24 divisors (see below), whose sum is σ = 258092028. Its totient is φ = 56429568.

The previous prime is 142224713. The next prime is 142224739. The reversal of 142224730 is 37422241.

It is a happy number.

142224730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 80586529 + 61638201 = 8977^2 + 7851^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142224695 and 142224704.

It is not an unprimeable number, because it can be changed into a prime (142224739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246202 + ... + 246778.

Almost surely, 2^142224730 is an apocalyptic number.

142224730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142224730 is a deficient number, since it is larger than the sum of its proper divisors (115867298).

142224730 is an equidigital number, since it uses as much as digits as its factorization.

142224730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 142224730 is about 11925.8010213151. The cubic root of 142224730 is about 521.9854201435.

Adding to 142224730 its reverse (37422241), we get a palindrome (179646971).

The spelling of 142224730 in words is "one hundred forty-two million, two hundred twenty-four thousand, seven hundred thirty".