142020545 has 4 divisors (see below), whose sum is σ = 170424660. Its totient is φ = 113616432.

The previous prime is 142020523. The next prime is 142020581. The reversal of 142020545 is 545020241.

It is a happy number.

142020545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545020241 = 1867 ⋅291923.

It can be written as a sum of positive squares in 2 ways, for example, as 14691889 + 127328656 = 3833^2 + 11284^2 .

It is a cyclic number.

It is not a de Polignac number, because 142020545 - 2⁶ = 142020481 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 142020545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14202050 + ... + 14202059.

It is an arithmetic number, because the mean of its divisors is an integer number (42606165).

Almost surely, 2^142020545 is an apocalyptic number.

It is an amenable number.

142020545 is a deficient number, since it is larger than the sum of its proper divisors (28404115).

142020545 is an equidigital number, since it uses as much as digits as its factorization.

142020545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28404114.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 142020545 is about 11917.2373056846. The cubic root of 142020545 is about 521.7355043040.

Adding to 142020545 its reverse (545020241), we get a palindrome (687040786).

The spelling of 142020545 in words is "one hundred forty-two million, twenty thousand, five hundred forty-five".