142745 has 4 divisors (see below), whose sum is σ = 171300. Its totient is φ = 114192.

The previous prime is 142733. The next prime is 142757. The reversal of 142745 is 547241.

142745 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.

It is an interprime number because it is at equal distance from previous prime (142733) and next prime (142757).

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 104329 = 196^2 + 323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142745 is a prime.

It is a super-2 number, since 2×142745² = 40752270050, which contains 22 as substring.

It is an Ulam number.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 142745.

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, 14270 + ... + 14279.

It is an arithmetic number, because the mean of its divisors is an integer number (42825).

2¹⁴²⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

142745 is a deficient number, since it is larger than the sum of its proper divisors (28555).

142745 is an equidigital number, since it uses as much as digits as its factorization.

142745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28554.

The product of its digits is 1120, while the sum is 23.

The square root of 142745 is about 377.8160928282. The cubic root of 142745 is about 52.2621134434.

Adding to 142745 its reverse (547241), we get a palindrome (689986).

Subtracting 142745 from its reverse (547241), we obtain a square (404496 = 636²).

The spelling of 142745 in words is "one hundred forty-two thousand, seven hundred forty-five".