1223001 has 12 divisors (see below), whose sum is σ = 1902628. Its totient is φ = 752544.

The previous prime is 1222993. The next prime is 1223003. The reversal of 1223001 is 1003221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 767376 + 455625 = 876^2 + 675^2 .

It is not a de Polignac number, because 1223001 - 2³ = 1222993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5110 + ... + 5343.

2^1223001 is an apocalyptic number.

It is an amenable number.

1223001 is a deficient number, since it is larger than the sum of its proper divisors (679627).

1223001 is a wasteful number, since it uses less digits than its factorization.

1223001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10472 (or 10469 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1223001 is about 1105.8937561990. The cubic root of 1223001 is about 106.9405148734.

Adding to 1223001 its reverse (1003221), we get a palindrome (2226222).

The spelling of 1223001 in words is "one million, two hundred twenty-three thousand, one".