1159381 has 2 divisors, whose sum is σ = 1159382. Its totient is φ = 1159380.

The previous prime is 1159339. The next prime is 1159393. The reversal of 1159381 is 1839511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 285156 = 935^2 + 534^2 .

It is an emirp because it is prime and its reverse (1839511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1159381 - 2¹¹ = 1157333 is a prime.

It is a super-2 number, since 2×1159381² = 2688328606322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1159981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579690 + 579691.

It is an arithmetic number, because the mean of its divisors is an integer number (579691).

2^1159381 is an apocalyptic number.

It is an amenable number.

1159381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159381 is an equidigital number, since it uses as much as digits as its factorization.

1159381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 28.

The square root of 1159381 is about 1076.7455595451. The cubic root of 1159381 is about 105.0530646366.

It can be divided in two parts, 1159 and 381, that added together give a triangular number (1540 = T₅₅).

The spelling of 1159381 in words is "one million, one hundred fifty-nine thousand, three hundred eighty-one".