142213745 has 4 divisors (see below), whose sum is σ = 170656500. Its totient is φ = 113770992.

The previous prime is 142213733. The next prime is 142213783. The reversal of 142213745 is 547312241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547312241 = 7 ⋅78187463.

It can be written as a sum of positive squares in 2 ways, for example, as 35236096 + 106977649 = 5936^2 + 10343^2 .

It is a cyclic number.

It is not a de Polignac number, because 142213745 - 2²⁰ = 141165169 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14221370 + ... + 14221379.

It is an arithmetic number, because the mean of its divisors is an integer number (42664125).

Almost surely, 2^142213745 is an apocalyptic number.

It is an amenable number.

142213745 is a deficient number, since it is larger than the sum of its proper divisors (28442755).

142213745 is an equidigital number, since it uses as much as digits as its factorization.

142213745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28442754.

The product of its digits is 6720, while the sum is 29.

The square root of 142213745 is about 11925.3404563560. The cubic root of 142213745 is about 521.9719809489.

Adding to 142213745 its reverse (547312241), we get a palindrome (689525986).

The spelling of 142213745 in words is "one hundred forty-two million, two hundred thirteen thousand, seven hundred forty-five".