142744121 has 8 divisors (see below), whose sum is σ = 162767304. Its totient is φ = 124012800.

The previous prime is 142744117. The next prime is 142744139. The reversal of 142744121 is 121447241.

It can be written as a sum of positive squares in 4 ways, for example, as 657721 + 142086400 = 811^2 + 11920^2 .

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 142744121 - 2² = 142744117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142744171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322730 + ... + 323171.

It is an arithmetic number, because the mean of its divisors is an integer number (20345913).

Almost surely, 2^142744121 is an apocalyptic number.

It is an amenable number.

142744121 is a deficient number, since it is larger than the sum of its proper divisors (20023183).

142744121 is a wasteful number, since it uses less digits than its factorization.

142744121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645931.

The product of its digits is 1792, while the sum is 26.

The square root of 142744121 is about 11947.5571143226. The cubic root of 142744121 is about 522.6200616934.

The spelling of 142744121 in words is "one hundred forty-two million, seven hundred forty-four thousand, one hundred twenty-one".