1205100940 has 36 divisors (see below), whose sum is σ = 2559802896. Its totient is φ = 476561536.

The previous prime is 1205100917. The next prime is 1205100943. The reversal of 1205100940 is 490015021.

It is not an unprimeable number, because it can be changed into a prime (1205100943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154617 + ... + 162223.

It is an arithmetic number, because the mean of its divisors is an integer number (71105636).

Almost surely, 2^1205100940 is an apocalyptic number.

1205100940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205100940 is an abundant number, since it is smaller than the sum of its proper divisors (1354701956).

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

1205100940 is an equidigital number, since it uses as much as digits as its factorization.

1205100940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7794 (or 7703 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1205100940 is about 34714.5638025311. The cubic root of 1205100940 is about 1064.1621511687.

Adding to 1205100940 its reverse (490015021), we get a palindrome (1695115961).

The spelling of 1205100940 in words is "one billion, two hundred five million, one hundred thousand, nine hundred forty".