1122581 has 8 divisors (see below), whose sum is σ = 1157184. Its totient is φ = 1088640.

The previous prime is 1122571. The next prime is 1122587. The reversal of 1122581 is 1852211.

It is a happy number.

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 1122581 - 2¹⁰ = 1121557 is a prime.

It is a super-2 number, since 2×1122581² = 2520376203122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6806 + ... + 6968.

It is an arithmetic number, because the mean of its divisors is an integer number (144648).

2^1122581 is an apocalyptic number.

It is an amenable number.

1122581 is a deficient number, since it is larger than the sum of its proper divisors (34603).

1122581 is an equidigital number, since it uses as much as digits as its factorization.

1122581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its digits is 160, while the sum is 20.

The square root of 1122581 is about 1059.5192305947. The cubic root of 1122581 is about 103.9295936189.

Adding to 1122581 its reverse (1852211), we get a palindrome (2974792).

The spelling of 1122581 in words is "one million, one hundred twenty-two thousand, five hundred eighty-one".