1220518 has 24 divisors (see below), whose sum is σ = 2081808. Its totient is φ = 535392.

The previous prime is 1220507. The next prime is 1220591. The reversal of 1220518 is 8150221.

It is a junction number, because it is equal to n+sod(n) for n = 1220495 and 1220504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7696 + ... + 7852.

It is an arithmetic number, because the mean of its divisors is an integer number (86742).

2^1220518 is an apocalyptic number.

1220518 is a deficient number, since it is larger than the sum of its proper divisors (861290).

1220518 is a wasteful number, since it uses less digits than its factorization.

1220518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1220518 is about 1104.7705644160. The cubic root of 1220518 is about 106.8680937822.

Adding to 1220518 its reverse (8150221), we get a palindrome (9370739).

The spelling of 1220518 in words is "one million, two hundred twenty thousand, five hundred eighteen".