1161200156 has 12 divisors (see below), whose sum is σ = 2087022168. Its totient is φ = 564908112.

The previous prime is 1161200137. The next prime is 1161200167. The reversal of 1161200156 is 6510021611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3922826 + ... + 3923121.

It is an arithmetic number, because the mean of its divisors is an integer number (173918514).

Almost surely, 2^1161200156 is an apocalyptic number.

It is an amenable number.

1161200156 is a deficient number, since it is larger than the sum of its proper divisors (925822012).

1161200156 is a wasteful number, since it uses less digits than its factorization.

1161200156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845988 (or 7845986 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1161200156 is about 34076.3870737495. The cubic root of 1161200156 is about 1051.0798131073.

Adding to 1161200156 its reverse (6510021611), we get a palindrome (7671221767).

It can be divided in two parts, 11612001 and 56, that multiplied together give a palindrome (650272056).

The spelling of 1161200156 in words is "one billion, one hundred sixty-one million, two hundred thousand, one hundred fifty-six".