1123291 has 8 divisors (see below), whose sum is σ = 1227744. Its totient is φ = 1021440.

The previous prime is 1123279. The next prime is 1123303. The reversal of 1123291 is 1923211.

It is an interprime number because it is at equal distance from previous prime (1123279) and next prime (1123303).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123291 - 2¹³ = 1115099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123211) 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 7 ways as a sum of consecutive naturals, for example, 315 + ... + 1531.

It is an arithmetic number, because the mean of its divisors is an integer number (153468).

2^1123291 is an apocalyptic number.

1123291 is a deficient number, since it is larger than the sum of its proper divisors (104453).

1123291 is a wasteful number, since it uses less digits than its factorization.

1123291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its digits is 108, while the sum is 19.

The square root of 1123291 is about 1059.8542352607. The cubic root of 1123291 is about 103.9514998215.

It can be divided in two parts, 112 and 3291, that added together give a triangular number (3403 = T₈₂).

The spelling of 1123291 in words is "one million, one hundred twenty-three thousand, two hundred ninety-one".