1161409 has 4 divisors (see below), whose sum is σ = 1165104. Its totient is φ = 1157716.

The previous prime is 1161403. The next prime is 1161437. The reversal of 1161409 is 9041611.

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 1161409 - 2³ = 1161401 is a prime.

It is an Ulam number.

It is a Duffinian number.

1161409 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1161409.

It is not an unprimeable number, because it can be changed into a prime (1161401) 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, 1327 + ... + 2020.

It is an arithmetic number, because the mean of its divisors is an integer number (291276).

2^1161409 is an apocalyptic number.

It is an amenable number.

1161409 is a deficient number, since it is larger than the sum of its proper divisors (3695).

1161409 is an equidigital number, since it uses as much as digits as its factorization.

1161409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1161409 is about 1077.6868747461. The cubic root of 1161409 is about 105.1142822214.

The spelling of 1161409 in words is "one million, one hundred sixty-one thousand, four hundred nine".