1223420 has 48 divisors (see below), whose sum is σ = 2878848. Its totient is φ = 432960.

The previous prime is 1223419. The next prime is 1223437. The reversal of 1223420 is 243221.

It is a junction number, because it is equal to n+sod(n) for n = 1223395 and 1223404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14699 + ... + 14781.

It is an arithmetic number, because the mean of its divisors is an integer number (59976).

2^1223420 is an apocalyptic number.

1223420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439424).

1223420 is an abundant number, since it is smaller than the sum of its proper divisors (1655428).

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

1223420 is a wasteful number, since it uses less digits than its factorization.

1223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1223420 is about 1106.0831795123. The cubic root of 1223420 is about 106.9527260817.

Adding to 1223420 its reverse (243221), we get a palindrome (1466641).

It can be divided in two parts, 12 and 23420, that added together give a palindrome (23432).

The spelling of 1223420 in words is "one million, two hundred twenty-three thousand, four hundred twenty".