1223678 has 4 divisors (see below), whose sum is σ = 1835520. Its totient is φ = 611838.

The previous prime is 1223633. The next prime is 1223683. The reversal of 1223678 is 8763221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8763221 = 1993 ⋅4397.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1223678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305918 + ... + 305921.

It is an arithmetic number, because the mean of its divisors is an integer number (458880).

2^1223678 is an apocalyptic number.

1223678 is a deficient number, since it is larger than the sum of its proper divisors (611842).

1223678 is an equidigital number, since it uses as much as digits as its factorization.

1223678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611841.

The product of its digits is 4032, while the sum is 29.

The square root of 1223678 is about 1106.1998011209. The cubic root of 1223678 is about 106.9602437681.

Adding to 1223678 its reverse (8763221), we get a palindrome (9986899).

The spelling of 1223678 in words is "one million, two hundred twenty-three thousand, six hundred seventy-eight".