142161223 has 2 divisors, whose sum is σ = 142161224. Its totient is φ = 142161222.

The previous prime is 142161181. The next prime is 142161251. The reversal of 142161223 is 322161241.

142161223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (322161241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142161223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142161194 and 142161203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142161823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71080611 + 71080612.

It is an arithmetic number, because the mean of its divisors is an integer number (71080612).

Almost surely, 2^142161223 is an apocalyptic number.

142161223 is a deficient number, since it is larger than the sum of its proper divisors (1).

142161223 is an equidigital number, since it uses as much as digits as its factorization.

142161223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 142161223 is about 11923.1381355749. The cubic root of 142161223 is about 521.9077152713.

The spelling of 142161223 in words is "one hundred forty-two million, one hundred sixty-one thousand, two hundred twenty-three".