1227444161 has 4 divisors (see below), whose sum is σ = 1232851632. Its totient is φ = 1222036692.

The previous prime is 1227444143. The next prime is 1227444199. The reversal of 1227444161 is 1614447221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1614447221 = 1097 ⋅1471693.

It is a cyclic number.

It is not a de Polignac number, because 1227444161 - 2¹⁴ = 1227427777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227444461) 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, 2703395 + ... + 2703848.

It is an arithmetic number, because the mean of its divisors is an integer number (308212908).

Almost surely, 2^1227444161 is an apocalyptic number.

It is an amenable number.

1227444161 is a deficient number, since it is larger than the sum of its proper divisors (5407471).

1227444161 is an equidigital number, since it uses as much as digits as its factorization.

1227444161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407470.

The product of its digits is 10752, while the sum is 32.

The square root of 1227444161 is about 35034.8991863827. The cubic root of 1227444161 is about 1070.6986327474.

The spelling of 1227444161 in words is "one billion, two hundred twenty-seven million, four hundred forty-four thousand, one hundred sixty-one".