1123001 has 6 divisors (see below), whose sum is σ = 1234506. Its totient is φ = 1020800.

The previous prime is 1122997. The next prime is 1123051. The reversal of 1123001 is 1003211.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 30976 = 1045^2 + 176^2 .

It is not a de Polignac number, because 1123001 - 2² = 1122997 is a prime.

It is a super-2 number, since 2×1123001² = 2522262492002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4520 + ... + 4761.

It is an arithmetic number, because the mean of its divisors is an integer number (205751).

2^1123001 is an apocalyptic number.

1123001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123001 is a deficient number, since it is larger than the sum of its proper divisors (111505).

1123001 is an equidigital number, since it uses as much as digits as its factorization.

1123001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9303 (or 9292 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1123001 is about 1059.7174151631. The cubic root of 1123001 is about 103.9425533331.

Adding to 1123001 its reverse (1003211), we get a palindrome (2126212).

It can be divided in two parts, 112 and 3001, that added together give a palindrome (3113).

The spelling of 1123001 in words is "one million, one hundred twenty-three thousand, one".