1205063261 has 8 divisors (see below), whose sum is σ = 1236275040. Its totient is φ = 1173996432.

The previous prime is 1205063227. The next prime is 1205063329. The reversal of 1205063261 is 1623605021.

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 1205063261 - 2²² = 1200868957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205063261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205063861) 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 7 ways as a sum of consecutive naturals, for example, 19295 + ... + 52748.

It is an arithmetic number, because the mean of its divisors is an integer number (154534380).

Almost surely, 2^1205063261 is an apocalyptic number.

It is an amenable number.

1205063261 is a deficient number, since it is larger than the sum of its proper divisors (31211779).

1205063261 is an equidigital number, since it uses as much as digits as its factorization.

1205063261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72475.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1205063261 is about 34714.0211009903. The cubic root of 1205063261 is about 1064.1510602628.

Adding to 1205063261 its reverse (1623605021), we get a palindrome (2828668282).

The spelling of 1205063261 in words is "one billion, two hundred five million, sixty-three thousand, two hundred sixty-one".