1161071000 has 128 divisors (see below), whose sum is σ = 2916388800. Its totient is φ = 431308800.

The previous prime is 1161070997. The next prime is 1161071003. The reversal of 1161071000 is 1701611.

It is an interprime number because it is at equal distance from previous prime (1161070997) and next prime (1161071003).

It is a self number, because there is not a number n which added to its sum of digits gives 1161071000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161071003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1006424 + ... + 1007576.

Almost surely, 2^1161071000 is an apocalyptic number.

1161071000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161071000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458194400).

1161071000 is an abundant number, since it is smaller than the sum of its proper divisors (1755317800).

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

1161071000 is a wasteful number, since it uses less digits than its factorization.

1161071000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 17.

The square root of 1161071000 is about 34074.4919257793. The cubic root of 1161071000 is about 1051.0408424220.

Adding to 1161071000 its reverse (1701611), we get a palindrome (1162772611).

The spelling of 1161071000 in words is "one billion, one hundred sixty-one million, seventy-one thousand".