1240204311 has 8 divisors (see below), whose sum is σ = 1837339760. Its totient is φ = 826802856.

The previous prime is 1240204307. The next prime is 1240204313. The reversal of 1240204311 is 1134020421.

It is not a de Polignac number, because 1240204311 - 2² = 1240204307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240204313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22966720 + ... + 22966773.

It is an arithmetic number, because the mean of its divisors is an integer number (229667470).

Almost surely, 2^1240204311 is an apocalyptic number.

1240204311 is a deficient number, since it is larger than the sum of its proper divisors (597135449).

1240204311 is an equidigital number, since it uses as much as digits as its factorization.

1240204311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45933502 (or 45933496 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1240204311 is about 35216.5346250877. The cubic root of 1240204311 is about 1074.3960728242.

Adding to 1240204311 its reverse (1134020421), we get a palindrome (2374224732).

The spelling of 1240204311 in words is "one billion, two hundred forty million, two hundred four thousand, three hundred eleven".