1205567221 has 8 divisors (see below), whose sum is σ = 1235710080. Its totient is φ = 1175520192.

The previous prime is 1205567219. The next prime is 1205567227. The reversal of 1205567221 is 1227655021.

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 1205567221 - 2¹ = 1205567219 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 (1205567227) 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, 1860 + ... + 49138.

It is an arithmetic number, because the mean of its divisors is an integer number (154463760).

Almost surely, 2^1205567221 is an apocalyptic number.

It is an amenable number.

1205567221 is a deficient number, since it is larger than the sum of its proper divisors (30142859).

1205567221 is an equidigital number, since it uses as much as digits as its factorization.

1205567221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47915.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1205567221 is about 34721.2790807021. The cubic root of 1205567221 is about 1064.2993829951.

The spelling of 1205567221 in words is "one billion, two hundred five million, five hundred sixty-seven thousand, two hundred twenty-one".