1240131231 has 6 divisors (see below), whose sum is σ = 1791300680. Its totient is φ = 826754148.

The previous prime is 1240131229. The next prime is 1240131239. The reversal of 1240131231 is 1321310421.

1240131231 is a `hidden beast` number, since 1 + 2 + 401 + 31 + 231 = 666.

It is not a de Polignac number, because 1240131231 - 2¹ = 1240131229 is a prime.

It is a super-2 number, since 2×1240131231² = 3075850940203150722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240131239) 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 5 ways as a sum of consecutive naturals, for example, 68896171 + ... + 68896188.

Almost surely, 2^1240131231 is an apocalyptic number.

1240131231 is a deficient number, since it is larger than the sum of its proper divisors (551169449).

1240131231 is a wasteful number, since it uses less digits than its factorization.

1240131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137792365 (or 137792362 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1240131231 is about 35215.4970290070. The cubic root of 1240131231 is about 1074.3749692026.

Adding to 1240131231 its reverse (1321310421), we get a palindrome (2561441652).

The spelling of 1240131231 in words is "one billion, two hundred forty million, one hundred thirty-one thousand, two hundred thirty-one".