1205450645 has 8 divisors (see below), whose sum is σ = 1653189504. Its totient is φ = 826594704.

The previous prime is 1205450591. The next prime is 1205450647. The reversal of 1205450645 is 5460545021.

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 1205450645 - 2⁶ = 1205450581 is a prime.

It is a super-2 number, since 2×1205450645² = 2906222515061832050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205450647) 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, 17220689 + ... + 17220758.

It is an arithmetic number, because the mean of its divisors is an integer number (206648688).

Almost surely, 2^1205450645 is an apocalyptic number.

It is an amenable number.

1205450645 is a deficient number, since it is larger than the sum of its proper divisors (447738859).

1205450645 is an equidigital number, since it uses as much as digits as its factorization.

1205450645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34441459.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 1205450645 is about 34719.6003001187. The cubic root of 1205450645 is about 1064.2650766641.

Adding to 1205450645 its reverse (5460545021), we get a palindrome (6665995666).

The spelling of 1205450645 in words is "one billion, two hundred five million, four hundred fifty thousand, six hundred forty-five".