1161278 has 4 divisors (see below), whose sum is σ = 1741920. Its totient is φ = 580638.

The previous prime is 1161269. The next prime is 1161289. The reversal of 1161278 is 8721611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8721611 = 1307 ⋅6673.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 290318 + ... + 290321.

It is an arithmetic number, because the mean of its divisors is an integer number (435480).

2^1161278 is an apocalyptic number.

1161278 is a deficient number, since it is larger than the sum of its proper divisors (580642).

1161278 is an equidigital number, since it uses as much as digits as its factorization.

1161278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580641.

The product of its digits is 672, while the sum is 26.

The square root of 1161278 is about 1077.6260947100. The cubic root of 1161278 is about 105.1103299850.

Adding to 1161278 its reverse (8721611), we get a palindrome (9882889).

The spelling of 1161278 in words is "one million, one hundred sixty-one thousand, two hundred seventy-eight".