1181253166 has 16 divisors (see below), whose sum is σ = 1803197088. Its totient is φ = 580212000.

The previous prime is 1181253163. The next prime is 1181253179. The reversal of 1181253166 is 6613521811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181253163) 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, 98391 + ... + 109741.

It is an arithmetic number, because the mean of its divisors is an integer number (112699818).

Almost surely, 2^1181253166 is an apocalyptic number.

1181253166 is a deficient number, since it is larger than the sum of its proper divisors (621943922).

1181253166 is a wasteful number, since it uses less digits than its factorization.

1181253166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12267.

The product of its digits is 8640, while the sum is 34.

The square root of 1181253166 is about 34369.3637706606. The cubic root of 1181253166 is about 1057.0957542215.

Adding to 1181253166 its reverse (6613521811), we get a palindrome (7794774977).

The spelling of 1181253166 in words is "one billion, one hundred eighty-one million, two hundred fifty-three thousand, one hundred sixty-six".