1223507 has 4 divisors (see below), whose sum is σ = 1295496. Its totient is φ = 1151520.

The previous prime is 1223491. The next prime is 1223527. The reversal of 1223507 is 7053221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223507 - 2⁴ = 1223491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223527) 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, 35969 + ... + 36002.

It is an arithmetic number, because the mean of its divisors is an integer number (323874).

2^1223507 is an apocalyptic number.

1223507 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1223507 is a deficient number, since it is larger than the sum of its proper divisors (71989).

1223507 is an equidigital number, since it uses as much as digits as its factorization.

1223507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71988.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 1223507 is about 1106.1225067776. The cubic root of 1223507 is about 106.9552612336.

Adding to 1223507 its reverse (7053221), we get a palindrome (8276728).

The spelling of 1223507 in words is "one million, two hundred twenty-three thousand, five hundred seven".