1181172481 has 8 divisors (see below), whose sum is σ = 1188190080. Its totient is φ = 1174171248.

The previous prime is 1181172467. The next prime is 1181172493. The reversal of 1181172481 is 1842711811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1181172481 is a prime.

It is a super-2 number, since 2×1181172481² = 2790336859743390722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181172451) 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, 159595 + ... + 166831.

It is an arithmetic number, because the mean of its divisors is an integer number (148523760).

Almost surely, 2^1181172481 is an apocalyptic number.

It is an amenable number.

1181172481 is a deficient number, since it is larger than the sum of its proper divisors (7017599).

1181172481 is an equidigital number, since it uses as much as digits as its factorization.

1181172481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8183.

The product of its digits is 3584, while the sum is 34.

The square root of 1181172481 is about 34368.1899581575. The cubic root of 1181172481 is about 1057.0716855134.

The spelling of 1181172481 in words is "one billion, one hundred eighty-one million, one hundred seventy-two thousand, four hundred eighty-one".