142246217 has 8 divisors (see below), whose sum is σ = 150096960. Its totient is φ = 134431920.

The previous prime is 142246213. The next prime is 142246231. The reversal of 142246217 is 712642241.

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 142246217 - 2² = 142246213 is a prime.

It is a super-2 number, since 2×142246217² = 40467972501622178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142246217.

It is not an unprimeable number, because it can be changed into a prime (142246213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893 + ... + 16890.

It is an arithmetic number, because the mean of its divisors is an integer number (18762120).

Almost surely, 2^142246217 is an apocalyptic number.

It is an amenable number.

142246217 is a deficient number, since it is larger than the sum of its proper divisors (7850743).

142246217 is a wasteful number, since it uses less digits than its factorization.

142246217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18223.

The product of its digits is 5376, while the sum is 29.

The square root of 142246217 is about 11926.7018492121. The cubic root of 142246217 is about 522.0117056236.

Adding to 142246217 its reverse (712642241), we get a palindrome (854888458).

The spelling of 142246217 in words is "one hundred forty-two million, two hundred forty-six thousand, two hundred seventeen".