142730845 has 4 divisors (see below), whose sum is σ = 171277020. Its totient is φ = 114184672.

The previous prime is 142730839. The next prime is 142730849. The reversal of 142730845 is 548037241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51451929 + 91278916 = 7173^2 + 9554^2 .

It is a cyclic number.

It is not a de Polignac number, because 142730845 - 2⁹ = 142730333 is a prime.

It is a super-2 number, since 2×142730845² = 40744188228828050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142730845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142730849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14273080 + ... + 14273089.

It is an arithmetic number, because the mean of its divisors is an integer number (42819255).

Almost surely, 2^142730845 is an apocalyptic number.

It is an amenable number.

142730845 is a deficient number, since it is larger than the sum of its proper divisors (28546175).

142730845 is an equidigital number, since it uses as much as digits as its factorization.

142730845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28546174.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 142730845 is about 11947.0015066543. The cubic root of 142730845 is about 522.6038589968.

The spelling of 142730845 in words is "one hundred forty-two million, seven hundred thirty thousand, eight hundred forty-five".