1181361057 has 8 divisors (see below), whose sum is σ = 1580525184. Its totient is φ = 784885488.

The previous prime is 1181361037. The next prime is 1181361067. The reversal of 1181361057 is 7501631811.

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

It is not a de Polignac number, because 1181361057 - 2⁶ = 1181360993 is a prime.

It is a super-2 number, since 2×1181361057² = 2791227893992314498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1181361037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671113 + ... + 672870.

It is an arithmetic number, because the mean of its divisors is an integer number (197565648).

Almost surely, 2^1181361057 is an apocalyptic number.

It is an amenable number.

1181361057 is a deficient number, since it is larger than the sum of its proper divisors (399164127).

1181361057 is a wasteful number, since it uses less digits than its factorization.

1181361057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344279.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 1181361057 is about 34370.9333158121. The cubic root of 1181361057 is about 1057.1279368924.

Adding to 1181361057 its reverse (7501631811), we get a palindrome (8682992868).

The spelling of 1181361057 in words is "one billion, one hundred eighty-one million, three hundred sixty-one thousand, fifty-seven".