1311041240 has 16 divisors (see below), whose sum is σ = 2949842880. Its totient is φ = 524416480.

The previous prime is 1311041227. The next prime is 1311041257. The reversal of 1311041240 is 421401131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16387976 + ... + 16388055.

It is an arithmetic number, because the mean of its divisors is an integer number (184365180).

Almost surely, 2^1311041240 is an apocalyptic number.

1311041240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311041240 is an abundant number, since it is smaller than the sum of its proper divisors (1638801640).

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

1311041240 is a wasteful number, since it uses less digits than its factorization.

1311041240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32776042 (or 32776038 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1311041240 is about 36208.3034675749. The cubic root of 1311041240 is about 1094.4740049295.

Adding to 1311041240 its reverse (421401131), we get a palindrome (1732442371).

The spelling of 1311041240 in words is "one billion, three hundred eleven million, forty-one thousand, two hundred forty".