1205221043 has 8 divisors (see below), whose sum is σ = 1299687648. Its totient is φ = 1111005504.

The previous prime is 1205221037. The next prime is 1205221051. The reversal of 1205221043 is 3401225021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1205221043 - 2⁶ = 1205220979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205221093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52730 + ... + 72047.

It is an arithmetic number, because the mean of its divisors is an integer number (162460956).

Almost surely, 2^1205221043 is an apocalyptic number.

1205221043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1205221043 is a deficient number, since it is larger than the sum of its proper divisors (94466605).

1205221043 is a wasteful number, since it uses less digits than its factorization.

1205221043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125533.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1205221043 is about 34716.2936241760. The cubic root of 1205221043 is about 1064.1975022382.

Adding to 1205221043 its reverse (3401225021), we get a palindrome (4606446064).

The spelling of 1205221043 in words is "one billion, two hundred five million, two hundred twenty-one thousand, forty-three".