1161134442 has 72 divisors (see below), whose sum is σ = 2884575564. Its totient is φ = 336241152.

The previous prime is 1161134411. The next prime is 1161134503. The reversal of 1161134442 is 2444311611.

1161134442 is a `hidden beast` number, since 1 + 1 + 611 + 3 + 4 + 4 + 42 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 111957561 + 1049176881 = 10581^2 + 32391^2 .

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 40488 + ... + 62940.

Almost surely, 2^1161134442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161134442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1442287782).

1161134442 is an abundant number, since it is smaller than the sum of its proper divisors (1723441122).

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

1161134442 is a wasteful number, since it uses less digits than its factorization.

1161134442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22504 (or 22488 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1161134442 is about 34075.4228440382. The cubic root of 1161134442 is about 1051.0599853566.

The spelling of 1161134442 in words is "one billion, one hundred sixty-one million, one hundred thirty-four thousand, four hundred forty-two".