1155940842 has 64 divisors (see below), whose sum is σ = 2710278144. Its totient is φ = 321816000.

The previous prime is 1155940837. The next prime is 1155940871. The reversal of 1155940842 is 2480495511.

It is a self number, because there is not a number n which added to its sum of digits gives 1155940842.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494308 + ... + 496640.

It is an arithmetic number, because the mean of its divisors is an integer number (42348096).

Almost surely, 2^1155940842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155940842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355139072).

1155940842 is an abundant number, since it is smaller than the sum of its proper divisors (1554337302).

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

1155940842 is a wasteful number, since it uses less digits than its factorization.

1155940842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1155940842 is about 33999.1300182814. The cubic root of 1155940842 is about 1049.4905592178.

The spelling of 1155940842 in words is "one billion, one hundred fifty-five million, nine hundred forty thousand, eight hundred forty-two".