142665223150261 has 4 divisors (see below), whose sum is σ = 163045969314592. Its totient is φ = 122284476985932.

The previous prime is 142665223150223. The next prime is 142665223150273. The reversal of 142665223150261 is 162051322566241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142665223150261 - 2¹³ = 142665223142069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142665223150201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10190373082155 + ... + 10190373082168.

It is an arithmetic number, because the mean of its divisors is an integer number (40761492328648).

Almost surely, 2^{142665223150261} is an apocalyptic number.

It is an amenable number.

142665223150261 is a deficient number, since it is larger than the sum of its proper divisors (20380746164331).

142665223150261 is an equidigital number, since it uses as much as digits as its factorization.

142665223150261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20380746164330.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 142665223150261 in words is "one hundred forty-two trillion, six hundred sixty-five billion, two hundred twenty-three million, one hundred fifty thousand, two hundred sixty-one".