1240931871 has 12 divisors (see below), whose sum is σ = 1836176160. Its totient is φ = 807109920.

The previous prime is 1240931849. The next prime is 1240931893. The reversal of 1240931871 is 1781390421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1240931849) and next prime (1240931893).

It is not a de Polignac number, because 1240931871 - 2²⁷ = 1106714143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240931821) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1681111 + ... + 1681848.

It is an arithmetic number, because the mean of its divisors is an integer number (153014680).

Almost surely, 2^1240931871 is an apocalyptic number.

1240931871 is a deficient number, since it is larger than the sum of its proper divisors (595244289).

1240931871 is a wasteful number, since it uses less digits than its factorization.

1240931871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363006 (or 3363003 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1240931871 is about 35226.8629173817. The cubic root of 1240931871 is about 1074.6061282137.

The spelling of 1240931871 in words is "one billion, two hundred forty million, nine hundred thirty-one thousand, eight hundred seventy-one".