1182561 has 4 divisors (see below), whose sum is σ = 1576752. Its totient is φ = 788372.

The previous prime is 1182547. The next prime is 1182581. The reversal of 1182561 is 1652811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1652811 = 3 ⋅550937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1182561 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1182521) 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, 197091 + ... + 197096.

It is an arithmetic number, because the mean of its divisors is an integer number (394188).

2^1182561 is an apocalyptic number.

It is an amenable number.

1182561 is a deficient number, since it is larger than the sum of its proper divisors (394191).

1182561 is an equidigital number, since it uses as much as digits as its factorization.

1182561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394190.

The product of its digits is 480, while the sum is 24.

The square root of 1182561 is about 1087.4562060148. The cubic root of 1182561 is about 105.7485734373.

The spelling of 1182561 in words is "one million, one hundred eighty-two thousand, five hundred sixty-one".