142421561142253 has 4 divisors (see below), whose sum is σ = 142422208694748. Its totient is φ = 142420913589760.

The previous prime is 142421561142151. The next prime is 142421561142271. The reversal of 142421561142253 is 352241165124241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63917034904969 + 78504526237284 = 7994813^2 + 8860278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142421561142253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142421561142353) 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, 323446228 + ... + 323886253.

It is an arithmetic number, because the mean of its divisors is an integer number (35605552173687).

Almost surely, 2^{142421561142253} is an apocalyptic number.

It is an amenable number.

142421561142253 is a deficient number, since it is larger than the sum of its proper divisors (647552495).

142421561142253 is an equidigital number, since it uses as much as digits as its factorization.

142421561142253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647552494.

The product of its digits is 460800, while the sum is 43.

The spelling of 142421561142253 in words is "one hundred forty-two trillion, four hundred twenty-one billion, five hundred sixty-one million, one hundred forty-two thousand, two hundred fifty-three".