1159242381 has 32 divisors (see below), whose sum is σ = 1875456000. Its totient is φ = 701846640.

The previous prime is 1159242367. The next prime is 1159242391. The reversal of 1159242381 is 1832429511.

1159242381 is a `hidden beast` number, since 1 + 159 + 2 + 423 + 81 = 666.

It is not a de Polignac number, because 1159242381 - 2⁵ = 1159242349 is a prime.

It is a super-2 number, since 2×1159242381² = 2687685795813098322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159242361) 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, 482020 + ... + 484418.

It is an arithmetic number, because the mean of its divisors is an integer number (58608000).

Almost surely, 2^1159242381 is an apocalyptic number.

1159242381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1159242381 is a deficient number, since it is larger than the sum of its proper divisors (716213619).

1159242381 is a wasteful number, since it uses less digits than its factorization.

1159242381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046 (or 4040 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1159242381 is about 34047.6486853351. The cubic root of 1159242381 is about 1050.4887765202.

The spelling of 1159242381 in words is "one billion, one hundred fifty-nine million, two hundred forty-two thousand, three hundred eighty-one".