1171731020 has 24 divisors (see below), whose sum is σ = 2465923824. Its totient is φ = 467685056.

The previous prime is 1171731019. The next prime is 1171731023. The reversal of 1171731020 is 201371711.

It is not an unprimeable number, because it can be changed into a prime (1171731023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53387 + ... + 72066.

It is an arithmetic number, because the mean of its divisors is an integer number (102746826).

Almost surely, 2^1171731020 is an apocalyptic number.

1171731020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171731020 is an abundant number, since it is smaller than the sum of its proper divisors (1294192804).

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

1171731020 is a wasteful number, since it uses less digits than its factorization.

1171731020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125929 (or 125927 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 23.

The square root of 1171731020 is about 34230.5568169728. The cubic root of 1171731020 is about 1054.2476521040.

The spelling of 1171731020 in words is "one billion, one hundred seventy-one million, seven hundred thirty-one thousand, twenty".