142561243 has 8 divisors (see below), whose sum is σ = 155801520. Its totient is φ = 129367680.

The previous prime is 142561213. The next prime is 142561277. The reversal of 142561243 is 342165241.

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 142561243 - 2²⁵ = 109006811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142561213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5130 + ... + 17647.

It is an arithmetic number, because the mean of its divisors is an integer number (19475190).

Almost surely, 2^142561243 is an apocalyptic number.

142561243 is a deficient number, since it is larger than the sum of its proper divisors (13240277).

142561243 is a wasteful number, since it uses less digits than its factorization.

142561243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23357.

The product of its digits is 5760, while the sum is 28.

The square root of 142561243 is about 11939.9012977495. The cubic root of 142561243 is about 522.3967797444.

The spelling of 142561243 in words is "one hundred forty-two million, five hundred sixty-one thousand, two hundred forty-three".