142838561 has 16 divisors (see below), whose sum is σ = 154598400. Its totient is φ = 131534928.

The previous prime is 142838519. The next prime is 142838567. The reversal of 142838561 is 165838241.

It is a cyclic number.

It is not a de Polignac number, because 142838561 - 2²² = 138644257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142838567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293060 + ... + 293546.

It is an arithmetic number, because the mean of its divisors is an integer number (9662400).

Almost surely, 2^142838561 is an apocalyptic number.

It is an amenable number.

142838561 is a deficient number, since it is larger than the sum of its proper divisors (11759839).

142838561 is a wasteful number, since it uses less digits than its factorization.

142838561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its digits is 46080, while the sum is 38.

The square root of 142838561 is about 11951.5087332102. The cubic root of 142838561 is about 522.7352920266.

The spelling of 142838561 in words is "one hundred forty-two million, eight hundred thirty-eight thousand, five hundred sixty-one".