1220700 has 72 divisors (see below), whose sum is σ = 3815728. Its totient is φ = 299520.

The previous prime is 1220699. The next prime is 1220711. The reversal of 1220700 is 70221.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 3744 + ... + 4056.

2^1220700 is an apocalyptic number.

1220700 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 1220700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907864).

1220700 is an abundant number, since it is smaller than the sum of its proper divisors (2595028).

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

1220700 is a wasteful number, since it uses less digits than its factorization.

1220700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 1220700 is about 1104.8529313895. The cubic root of 1220700 is about 106.8734054685.

Adding to 1220700 its reverse (70221), we get a palindrome (1290921).

The spelling of 1220700 in words is "one million, two hundred twenty thousand, seven hundred".