1240312775 has 24 divisors (see below), whose sum is σ = 1753731504. Its totient is φ = 862041600.

The previous prime is 1240312757. The next prime is 1240312783. The reversal of 1240312775 is 5772130421.

It is not a de Polignac number, because 1240312775 - 2¹⁸ = 1240050631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106721 + ... + 117770.

It is an arithmetic number, because the mean of its divisors is an integer number (73072146).

Almost surely, 2^1240312775 is an apocalyptic number.

1240312775 is a deficient number, since it is larger than the sum of its proper divisors (513418729).

1240312775 is a wasteful number, since it uses less digits than its factorization.

1240312775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224531 (or 224526 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1240312775 is about 35218.0745498671. The cubic root of 1240312775 is about 1074.4273929052.

The spelling of 1240312775 in words is "one billion, two hundred forty million, three hundred twelve thousand, seven hundred seventy-five".