142217225 has 6 divisors (see below), whose sum is σ = 176349390. Its totient is φ = 113773760.

The previous prime is 142217221. The next prime is 142217239. The reversal of 142217225 is 522712241.

It can be written as a sum of positive squares in 3 ways, for example, as 45549001 + 96668224 = 6749^2 + 9832^2 .

It is not a de Polignac number, because 142217225 - 2² = 142217221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142217194 and 142217203.

It is not an unprimeable number, because it can be changed into a prime (142217221) 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, 2844320 + ... + 2844369.

It is an arithmetic number, because the mean of its divisors is an integer number (29391565).

Almost surely, 2^142217225 is an apocalyptic number.

It is an amenable number.

142217225 is a deficient number, since it is larger than the sum of its proper divisors (34132165).

142217225 is an equidigital number, since it uses as much as digits as its factorization.

142217225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688699 (or 5688694 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 142217225 is about 11925.4863632474. The cubic root of 142217225 is about 521.9762385019.

Adding to 142217225 its reverse (522712241), we get a palindrome (664929466).

The spelling of 142217225 in words is "one hundred forty-two million, two hundred seventeen thousand, two hundred twenty-five".