142309223 has 4 divisors (see below), whose sum is σ = 162639120. Its totient is φ = 121979328.

The previous prime is 142309171. The next prime is 142309247. The reversal of 142309223 is 322903241.

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

It is a cyclic number.

It is not a de Polignac number, because 142309223 - 2⁸ = 142308967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142309192 and 142309201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142309423) 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, 10164938 + ... + 10164951.

It is an arithmetic number, because the mean of its divisors is an integer number (40659780).

Almost surely, 2^142309223 is an apocalyptic number.

142309223 is a deficient number, since it is larger than the sum of its proper divisors (20329897).

142309223 is an equidigital number, since it uses as much as digits as its factorization.

142309223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20329896.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 142309223 is about 11929.3429408329. The cubic root of 142309223 is about 522.0887668755.

The spelling of 142309223 in words is "one hundred forty-two million, three hundred nine thousand, two hundred twenty-three".