127105223 has 4 divisors (see below), whose sum is σ = 145263120. Its totient is φ = 108947328.

The previous prime is 127105217. The next prime is 127105267. The reversal of 127105223 is 322501721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322501721 = 29 ⋅11120749.

It is a de Polignac number, because none of the positive numbers 2^k-127105223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127105423) 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, 9078938 + ... + 9078951.

It is an arithmetic number, because the mean of its divisors is an integer number (36315780).

Almost surely, 2^127105223 is an apocalyptic number.

127105223 is a deficient number, since it is larger than the sum of its proper divisors (18157897).

127105223 is an equidigital number, since it uses as much as digits as its factorization.

127105223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18157896.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 127105223 is about 11274.0952186861. The cubic root of 127105223 is about 502.7913517123.

Adding to 127105223 its reverse (322501721), we get a palindrome (449606944).

The spelling of 127105223 in words is "one hundred twenty-seven million, one hundred five thousand, two hundred twenty-three".