1161587 has 4 divisors (see below), whose sum is σ = 1327536. Its totient is φ = 995640.

The previous prime is 1161581. The next prime is 1161599. The reversal of 1161587 is 7851611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1161587 - 2⁸ = 1161331 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1161581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82964 + ... + 82977.

It is an arithmetic number, because the mean of its divisors is an integer number (331884).

2^1161587 is an apocalyptic number.

1161587 is a deficient number, since it is larger than the sum of its proper divisors (165949).

1161587 is an equidigital number, since it uses as much as digits as its factorization.

1161587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165948.

The product of its digits is 1680, while the sum is 29.

The square root of 1161587 is about 1077.7694558671. The cubic root of 1161587 is about 105.1196519595.

The spelling of 1161587 in words is "one million, one hundred sixty-one thousand, five hundred eighty-seven".