1223271445 has 32 divisors (see below), whose sum is σ = 1679284224. Its totient is φ = 846753600.

The previous prime is 1223271421. The next prime is 1223271451. The reversal of 1223271445 is 5441723221.

It is a happy number.

It is not a de Polignac number, because 1223271445 - 2¹⁹ = 1222747157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264624 + ... + 269206.

It is an arithmetic number, because the mean of its divisors is an integer number (52477632).

Almost surely, 2^1223271445 is an apocalyptic number.

It is an amenable number.

1223271445 is a deficient number, since it is larger than the sum of its proper divisors (456012779).

1223271445 is a wasteful number, since it uses less digits than its factorization.

1223271445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4833.

The product of its digits is 13440, while the sum is 31.

The square root of 1223271445 is about 34975.2976399058. The cubic root of 1223271445 is about 1069.4839695912.

Adding to 1223271445 its reverse (5441723221), we get a palindrome (6664994666).

The spelling of 1223271445 in words is "one billion, two hundred twenty-three million, two hundred seventy-one thousand, four hundred forty-five".