142728577 has 8 divisors (see below), whose sum is σ = 143721864. Its totient is φ = 141739008.

The previous prime is 142728541. The next prime is 142728581. The reversal of 142728577 is 775827241.

It can be written as a sum of positive squares in 4 ways, for example, as 44302336 + 98426241 = 6656^2 + 9921^2 .

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 142728577 - 2²⁷ = 8510849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142728527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137653 + ... + 138685.

It is an arithmetic number, because the mean of its divisors is an integer number (17965233).

Almost surely, 2^142728577 is an apocalyptic number.

It is an amenable number.

142728577 is a deficient number, since it is larger than the sum of its proper divisors (993287).

142728577 is a wasteful number, since it uses less digits than its factorization.

142728577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859.

The product of its digits is 219520, while the sum is 43.

The square root of 142728577 is about 11946.9065870626. The cubic root of 142728577 is about 522.6010909153.

The spelling of 142728577 in words is "one hundred forty-two million, seven hundred twenty-eight thousand, five hundred seventy-seven".