1121278 has 4 divisors (see below), whose sum is σ = 1681920. Its totient is φ = 560638.

The previous prime is 1121261. The next prime is 1121293. The reversal of 1121278 is 8721211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8721211 = 283 ⋅30817.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280318 + ... + 280321.

It is an arithmetic number, because the mean of its divisors is an integer number (420480).

2^1121278 is an apocalyptic number.

1121278 is a deficient number, since it is larger than the sum of its proper divisors (560642).

1121278 is an equidigital number, since it uses as much as digits as its factorization.

1121278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560641.

The product of its digits is 224, while the sum is 22.

The square root of 1121278 is about 1058.9041505254. The cubic root of 1121278 is about 103.8893670668.

Adding to 1121278 its reverse (8721211), we get a palindrome (9842489).

The spelling of 1121278 in words is "one million, one hundred twenty-one thousand, two hundred seventy-eight".