1223547 has 16 divisors (see below), whose sum is σ = 1777440. Its totient is φ = 744192.

The previous prime is 1223533. The next prime is 1223549. The reversal of 1223547 is 7453221.

It is not a de Polignac number, because 1223547 - 2⁷ = 1223419 is a prime.

It is a super-2 number, since 2×1223547² = 2994134522418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1223549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5229 + ... + 5457.

It is an arithmetic number, because the mean of its divisors is an integer number (111090).

2^1223547 is an apocalyptic number.

1223547 is a deficient number, since it is larger than the sum of its proper divisors (553893).

1223547 is a wasteful number, since it uses less digits than its factorization.

1223547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382.

The product of its digits is 1680, while the sum is 24.

The square root of 1223547 is about 1106.1405878097. The cubic root of 1223547 is about 106.9564267803.

Adding to 1223547 its reverse (7453221), we get a palindrome (8676768).

It can be divided in two parts, 1223 and 547, that added together give a triangular number (1770 = T₅₉).

The spelling of 1223547 in words is "one million, two hundred twenty-three thousand, five hundred forty-seven".