142185997127329 has 3 divisors (see below), whose sum is σ = 142186009051507. Its totient is φ = 142185985203152.

The previous prime is 142185997127311. The next prime is 142185997127413. The reversal of 142185997127329 is 923721799581241.

The square root of 142185997127329 is 11924177.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 43180472304225 + 99005524823104 = 6571185^2 + 9950152^2 .

It is not a de Polignac number, because 142185997127329 - 2¹³ = 142185997119137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142185997127729) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5962089 + ... + 17886265.

Almost surely, 2^{142185997127329} is an apocalyptic number.

142185997127329 is the 11924177-th square number.

142185997127329 is the 5962089-th centered octagonal number.

It is an amenable number.

142185997127329 is a deficient number, since it is larger than the sum of its proper divisors (11924178).

142185997127329 is an frugal number, since it uses more digits than its factorization.

142185997127329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23848354 (or 11924177 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 70.

The spelling of 142185997127329 in words is "one hundred forty-two trillion, one hundred eighty-five billion, nine hundred ninety-seven million, one hundred twenty-seven thousand, three hundred twenty-nine".