1131271740 has 72 divisors (see below), whose sum is σ = 3472913808. Its totient is φ = 298033920.

The previous prime is 1131271727. The next prime is 1131271741. The reversal of 1131271740 is 471721311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131271741) 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 23 ways as a sum of consecutive naturals, for example, 22921 + ... + 52800.

It is an arithmetic number, because the mean of its divisors is an integer number (48234914).

Almost surely, 2^1131271740 is an apocalyptic number.

1131271740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131271740 is an abundant number, since it is smaller than the sum of its proper divisors (2341642068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131271740 is a wasteful number, since it uses less digits than its factorization.

1131271740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75819 (or 75814 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 1131271740 is about 33634.3833004264. The cubic root of 1131271740 is about 1041.9710340299.

The spelling of 1131271740 in words is "one billion, one hundred thirty-one million, two hundred seventy-one thousand, seven hundred forty".