1205540046 has 12 divisors (see below), whose sum is σ = 2612003472. Its totient is φ = 401846676.

The previous prime is 1205540041. The next prime is 1205540047. The reversal of 1205540046 is 6400455021.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205540041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33487206 + ... + 33487241.

It is an arithmetic number, because the mean of its divisors is an integer number (217666956).

Almost surely, 2^1205540046 is an apocalyptic number.

1205540046 is an abundant number, since it is smaller than the sum of its proper divisors (1406463426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205540046 is a wasteful number, since it uses less digits than its factorization.

1205540046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66974455 (or 66974452 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1205540046 is about 34720.8877478673. The cubic root of 1205540046 is about 1064.2913860532.

Adding to 1205540046 its reverse (6400455021), we get a palindrome (7605995067).

The spelling of 1205540046 in words is "one billion, two hundred five million, five hundred forty thousand, forty-six".