1161354240 has 352 divisors, whose sum is σ = 4276101120. Its totient is φ = 298598400.

The previous prime is 1161354221. The next prime is 1161354247. The reversal of 1161354240 is 424531611.

It is a happy number.

1161354240 is a `hidden beast` number, since 1 + 1 + 613 + 5 + 4 + 2 + 40 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161354247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4285305 + ... + 4285575.

Almost surely, 2^1161354240 is an apocalyptic number.

1161354240 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 1161354240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138050560).

1161354240 is an abundant number, since it is smaller than the sum of its proper divisors (3114746880).

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

1161354240 is a wasteful number, since it uses less digits than its factorization.

1161354240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1161354240 is about 34078.6478605006. The cubic root of 1161354240 is about 1051.1263016241.

Adding to 1161354240 its reverse (424531611), we get a palindrome (1585885851).

The spelling of 1161354240 in words is "one billion, one hundred sixty-one million, three hundred fifty-four thousand, two hundred forty".