142212005 has 8 divisors (see below), whose sum is σ = 183781752. Its totient is φ = 105018048.

The previous prime is 142211999. The next prime is 142212011. The reversal of 142212005 is 500212241.

It is an interprime number because it is at equal distance from previous prime (142211999) and next prime (142212011).

It can be written as a sum of positive squares in 4 ways, for example, as 744769 + 141467236 = 863^2 + 11894^2 .

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 142212005 - 2¹⁴ = 142195621 is a prime.

It is a super-2 number, since 2×142212005² = 40448508732240050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093874 + ... + 1094003.

It is an arithmetic number, because the mean of its divisors is an integer number (22972719).

Almost surely, 2^142212005 is an apocalyptic number.

It is an amenable number.

142212005 is a deficient number, since it is larger than the sum of its proper divisors (41569747).

142212005 is a wasteful number, since it uses less digits than its factorization.

142212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187895.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 142212005 is about 11925.2675022408. The cubic root of 142212005 is about 521.9698521463.

Adding to 142212005 its reverse (500212241), we get a palindrome (642424246).

The spelling of 142212005 in words is "one hundred forty-two million, two hundred twelve thousand, five".