142722145 has 4 divisors (see below), whose sum is σ = 171266580. Its totient is φ = 114177712.

The previous prime is 142722143. The next prime is 142722187. The reversal of 142722145 is 541227241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541227241 = 4337 ⋅124793.

It can be written as a sum of positive squares in 2 ways, for example, as 83923921 + 58798224 = 9161^2 + 7668^2 .

It is a cyclic number.

It is not a de Polignac number, because 142722145 - 2¹ = 142722143 is a prime.

It is a super-2 number, since 2×142722145² = 40739221346802050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142722143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14272210 + ... + 14272219.

It is an arithmetic number, because the mean of its divisors is an integer number (42816645).

Almost surely, 2^142722145 is an apocalyptic number.

It is an amenable number.

142722145 is a deficient number, since it is larger than the sum of its proper divisors (28544435).

142722145 is an equidigital number, since it uses as much as digits as its factorization.

142722145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28544434.

The product of its digits is 4480, while the sum is 28.

The square root of 142722145 is about 11946.6373930073. The cubic root of 142722145 is about 522.5932405353.

Adding to 142722145 its reverse (541227241), we get a palindrome (683949386).

The spelling of 142722145 in words is "one hundred forty-two million, seven hundred twenty-two thousand, one hundred forty-five".