1164561 has 4 divisors (see below), whose sum is σ = 1552752. Its totient is φ = 776372.

The previous prime is 1164557. The next prime is 1164571. The reversal of 1164561 is 1654611.

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.

It is a cyclic number.

It is not a de Polignac number, because 1164561 - 2² = 1164557 is a prime.

It is a D-number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1164511) 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, 194091 + ... + 194096.

It is an arithmetic number, because the mean of its divisors is an integer number (388188).

2^1164561 is an apocalyptic number.

It is an amenable number.

1164561 is a deficient number, since it is larger than the sum of its proper divisors (388191).

1164561 is an equidigital number, since it uses as much as digits as its factorization.

1164561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388190.

The product of its digits is 720, while the sum is 24.

The square root of 1164561 is about 1079.1482752616. The cubic root of 1164561 is about 105.2092877823.

The spelling of 1164561 in words is "one million, one hundred sixty-four thousand, five hundred sixty-one".