1161030156 has 144 divisors (see below), whose sum is σ = 3329679360. Its totient is φ = 310400640.

The previous prime is 1161030121. The next prime is 1161030163. The reversal of 1161030156 is 6510301611.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 907125 + ... + 908403.

Almost surely, 2^1161030156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161030156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664839680).

1161030156 is an abundant number, since it is smaller than the sum of its proper divisors (2168649204).

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

1161030156 is a wasteful number, since it uses less digits than its factorization.

1161030156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1161030156 is about 34073.8925865537. The cubic root of 1161030156 is about 1051.0285178195.

Adding to 1161030156 its reverse (6510301611), we get a palindrome (7671331767).

The spelling of 1161030156 in words is "one billion, one hundred sixty-one million, thirty thousand, one hundred fifty-six".