142306223 has 4 divisors (see below), whose sum is σ = 144310608. Its totient is φ = 140301840.

The previous prime is 142306189. The next prime is 142306237. The reversal of 142306223 is 322603241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322603241 = 127 ⋅2540183.

It is a cyclic number.

It is not a de Polignac number, because 142306223 - 2¹⁶ = 142240687 is a prime.

It is a super-2 number, since 2×142306223² = 40502122209051458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142306123) 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, 1002086 + ... + 1002227.

It is an arithmetic number, because the mean of its divisors is an integer number (36077652).

Almost surely, 2^142306223 is an apocalyptic number.

142306223 is a deficient number, since it is larger than the sum of its proper divisors (2004385).

142306223 is an equidigital number, since it uses as much as digits as its factorization.

142306223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004384.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 142306223 is about 11929.2171997998. The cubic root of 142306223 is about 522.0850981573.

Adding to 142306223 its reverse (322603241), we get a palindrome (464909464).

The spelling of 142306223 in words is "one hundred forty-two million, three hundred six thousand, two hundred twenty-three".