142217386 has 4 divisors (see below), whose sum is σ = 213326082. Its totient is φ = 71108692.

The previous prime is 142217357. The next prime is 142217401. The reversal of 142217386 is 683712241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 137616361 + 4601025 = 11731^2 + 2145^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 35554345 + ... + 35554348.

Almost surely, 2^142217386 is an apocalyptic number.

142217386 is a deficient number, since it is larger than the sum of its proper divisors (71108696).

142217386 is an equidigital number, since it uses as much as digits as its factorization.

142217386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71108695.

The product of its digits is 16128, while the sum is 34.

The square root of 142217386 is about 11925.4931134943. The cubic root of 142217386 is about 521.9764354732.

The spelling of 142217386 in words is "one hundred forty-two million, two hundred seventeen thousand, three hundred eighty-six".