1223634 has 16 divisors (see below), whose sum is σ = 2471040. Its totient is φ = 403920.

The previous prime is 1223633. The next prime is 1223683. The reversal of 1223634 is 4363221.

1223634 = T₉₂ + T₉₃ + ... + T₂₀₀.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223634.

It is not an unprimeable number, because it can be changed into a prime (1223633) 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 7 ways as a sum of consecutive naturals, for example, 282 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (154440).

2^1223634 is an apocalyptic number.

1223634 is an abundant number, since it is smaller than the sum of its proper divisors (1247406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223634 is a wasteful number, since it uses less digits than its factorization.

1223634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985.

The product of its digits is 864, while the sum is 21.

The square root of 1223634 is about 1106.1799130340. The cubic root of 1223634 is about 106.9589617568.

Adding to 1223634 its reverse (4363221), we get a palindrome (5586855).

The spelling of 1223634 in words is "one million, two hundred twenty-three thousand, six hundred thirty-four".