1161427 has 4 divisors (see below), whose sum is σ = 1164240. Its totient is φ = 1158616.

The previous prime is 1161403. The next prime is 1161437. The reversal of 1161427 is 7241611.

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 1161427 - 2¹⁹ = 637139 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161398 and 1161407.

It is not an unprimeable number, because it can be changed into a prime (1161437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652 + ... + 1657.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

2^1161427 is an apocalyptic number.

1161427 is a deficient number, since it is larger than the sum of its proper divisors (2813).

1161427 is an equidigital number, since it uses as much as digits as its factorization.

1161427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812.

The product of its digits is 336, while the sum is 22.

The square root of 1161427 is about 1077.6952259336. The cubic root of 1161427 is about 105.1148252536.

The spelling of 1161427 in words is "one million, one hundred sixty-one thousand, four hundred twenty-seven".