1220472 has 96 divisors (see below), whose sum is σ = 3818880. Its totient is φ = 348480.

The previous prime is 1220437. The next prime is 1220489. The reversal of 1220472 is 2740221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18183 + ... + 18249.

It is an arithmetic number, because the mean of its divisors is an integer number (39780).

2^1220472 is an apocalyptic number.

1220472 is a gapful number since it is divisible by the number (12) 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 1220472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909440).

1220472 is an abundant number, since it is smaller than the sum of its proper divisors (2598408).

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

1220472 is a wasteful number, since it uses less digits than its factorization.

1220472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1220472 is about 1104.7497454175. The cubic root of 1220472 is about 106.8667511844.

Adding to 1220472 its reverse (2740221), we get a palindrome (3960693).

The spelling of 1220472 in words is "one million, two hundred twenty thousand, four hundred seventy-two".