1205481380 has 24 divisors (see below), whose sum is σ = 2585374848. Its totient is φ = 471932768.

The previous prime is 1205481379. The next prime is 1205481383. The reversal of 1205481380 is 831845021.

It is not an unprimeable number, because it can be changed into a prime (1205481383) 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 7 ways as a sum of consecutive naturals, for example, 640274 + ... + 642153.

It is an arithmetic number, because the mean of its divisors is an integer number (107723952).

Almost surely, 2^1205481380 is an apocalyptic number.

1205481380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205481380 is an abundant number, since it is smaller than the sum of its proper divisors (1379893468).

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

1205481380 is a wasteful number, since it uses less digits than its factorization.

1205481380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282483 (or 1282481 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1205481380 is about 34720.0429147200. The cubic root of 1205481380 is about 1064.2741216658.

The spelling of 1205481380 in words is "one billion, two hundred five million, four hundred eighty-one thousand, three hundred eighty".