142216705 has 8 divisors (see below), whose sum is σ = 178080192. Its totient is φ = 108826608.

The previous prime is 142216703. The next prime is 142216717. The reversal of 142216705 is 507612241.

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 142216705 - 2¹ = 142216703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142216703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618219 + ... + 618448.

It is an arithmetic number, because the mean of its divisors is an integer number (22260024).

Almost surely, 2^142216705 is an apocalyptic number.

It is an amenable number.

142216705 is a deficient number, since it is larger than the sum of its proper divisors (35863487).

142216705 is a wasteful number, since it uses less digits than its factorization.

142216705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236695.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 142216705 is about 11925.4645611817. The cubic root of 142216705 is about 521.9756023202.

Adding to 142216705 its reverse (507612241), we get a palindrome (649828946).

The spelling of 142216705 in words is "one hundred forty-two million, two hundred sixteen thousand, seven hundred five".