1205221054 has 12 divisors (see below), whose sum is σ = 1858016664. Its totient is φ = 586322424.

The previous prime is 1205221051. The next prime is 1205221081. The reversal of 1205221054 is 4501225021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217354 + ... + 222829.

It is an arithmetic number, because the mean of its divisors is an integer number (154834722).

Almost surely, 2^1205221054 is an apocalyptic number.

1205221054 is a deficient number, since it is larger than the sum of its proper divisors (652795610).

1205221054 is an equidigital number, since it uses as much as digits as its factorization.

1205221054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440259 (or 440222 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1205221054 is about 34716.2937826030. The cubic root of 1205221054 is about 1064.1975054758.

Adding to 1205221054 its reverse (4501225021), we get a palindrome (5706446075).

The spelling of 1205221054 in words is "one billion, two hundred five million, two hundred twenty-one thousand, fifty-four".