1157872842 has 72 divisors (see below), whose sum is σ = 2966291172. Its totient is φ = 325382400.

The previous prime is 1157872741. The next prime is 1157872861. The reversal of 1157872842 is 2482787511.

1157872842 is a `hidden beast` number, since 1 + 1 + 578 + 72 + 8 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1060870041 + 97002801 = 32571^2 + 9849^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43042 + ... + 64562.

Almost surely, 2^1157872842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157872842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1483145586).

1157872842 is an abundant number, since it is smaller than the sum of its proper divisors (1808418330).

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

1157872842 is a wasteful number, since it uses less digits than its factorization.

1157872842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21604 (or 21594 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 1157872842 is about 34027.5306479915. The cubic root of 1157872842 is about 1050.0749279863.

The spelling of 1157872842 in words is "one billion, one hundred fifty-seven million, eight hundred seventy-two thousand, eight hundred forty-two".