1223642 has 8 divisors (see below), whose sum is σ = 2097696. Its totient is φ = 524412.

The previous prime is 1223633. The next prime is 1223683. The reversal of 1223642 is 2463221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43688 + ... + 43715.

It is an arithmetic number, because the mean of its divisors is an integer number (262212).

2^1223642 is an apocalyptic number.

1223642 is a deficient number, since it is larger than the sum of its proper divisors (874054).

1223642 is an equidigital number, since it uses as much as digits as its factorization.

1223642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87412.

The product of its digits is 576, while the sum is 20.

The square root of 1223642 is about 1106.1835290764. The cubic root of 1223642 is about 106.9591948521.

Adding to 1223642 its reverse (2463221), we get a palindrome (3686863).

The spelling of 1223642 in words is "one million, two hundred twenty-three thousand, six hundred forty-two".