1171552140 has 192 divisors, whose sum is σ = 4010065920. Its totient is φ = 281594880.

The previous prime is 1171552139. The next prime is 1171552169. The reversal of 1171552140 is 412551711.

1171552140 is a `hidden beast` number, since 1 + 1 + 71 + 552 + 1 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 753604 + ... + 755156.

It is an arithmetic number, because the mean of its divisors is an integer number (20885760).

Almost surely, 2^1171552140 is an apocalyptic number.

1171552140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1171552140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005032960).

1171552140 is an abundant number, since it is smaller than the sum of its proper divisors (2838513780).

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

1171552140 is a wasteful number, since it uses less digits than its factorization.

1171552140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 1171552140 is about 34227.9438470966. The cubic root of 1171552140 is about 1054.1940011625.

The spelling of 1171552140 in words is "one billion, one hundred seventy-one million, five hundred fifty-two thousand, one hundred forty".