1223513 has 4 divisors (see below), whose sum is σ = 1225728. Its totient is φ = 1221300.

The previous prime is 1223491. The next prime is 1223527. The reversal of 1223513 is 3153221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1223513 - 2⁶ = 1223449 is a prime.

It is a super-2 number, since 2×1223513² = 2993968122338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223491 and 1223500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223533) 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 3 ways as a sum of consecutive naturals, for example, 488 + ... + 1638.

It is an arithmetic number, because the mean of its divisors is an integer number (306432).

2^1223513 is an apocalyptic number.

It is an amenable number.

1223513 is a deficient number, since it is larger than the sum of its proper divisors (2215).

1223513 is a wasteful number, since it uses less digits than its factorization.

1223513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214.

The product of its digits is 180, while the sum is 17.

The square root of 1223513 is about 1106.1252189513. The cubic root of 1223513 is about 106.9554360672.

Adding to 1223513 its reverse (3153221), we get a palindrome (4376734).

The spelling of 1223513 in words is "one million, two hundred twenty-three thousand, five hundred thirteen".