1220760 has 48 divisors (see below), whose sum is σ = 3968640. Its totient is φ = 325440.

The previous prime is 1220743. The next prime is 1220761. The reversal of 1220760 is 670221.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1336 + ... + 2055.

It is an arithmetic number, because the mean of its divisors is an integer number (82680).

2^1220760 is an apocalyptic number.

1220760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220760 is an abundant number, since it is smaller than the sum of its proper divisors (2747880).

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

1220760 is a wasteful number, since it uses less digits than its factorization.

1220760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408 (or 3401 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1220760 is about 1104.8800839910. The cubic root of 1220760 is about 106.8751564582.

Adding to 1220760 its reverse (670221), we get a palindrome (1890981).

The spelling of 1220760 in words is "one million, two hundred twenty thousand, seven hundred sixty".