1240640271 has 48 divisors (see below), whose sum is σ = 2034396000. Its totient is φ = 723131136.

The previous prime is 1240640251. The next prime is 1240640287. The reversal of 1240640271 is 1720460421.

1240640271 is a `hidden beast` number, since 12 + 4 + 0 + 640 + 2 + 7 + 1 = 666.

It is not a de Polignac number, because 1240640271 - 2⁵ = 1240640239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240640201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176380 + ... + 183278.

It is an arithmetic number, because the mean of its divisors is an integer number (42383250).

Almost surely, 2^1240640271 is an apocalyptic number.

1240640271 is a deficient number, since it is larger than the sum of its proper divisors (793755729).

1240640271 is a wasteful number, since it uses less digits than its factorization.

1240640271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000 (or 6997 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1240640271 is about 35222.7237873507. The cubic root of 1240640271 is about 1074.5219496212.

The spelling of 1240640271 in words is "one billion, two hundred forty million, six hundred forty thousand, two hundred seventy-one".