1220016 has 40 divisors (see below), whose sum is σ = 3602944. Its totient is φ = 348480.

The previous prime is 1219991. The next prime is 1220027. The reversal of 1220016 is 6100221.

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

It is a junction number, because it is equal to n+sod(n) for n = 1219983 and 1220010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480 + ... + 2151.

2^1220016 is an apocalyptic number.

1220016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1220016 is an abundant number, since it is smaller than the sum of its proper divisors (2382928).

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

1220016 is a wasteful number, since it uses less digits than its factorization.

1220016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649 (or 3643 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1220016 is about 1104.5433445547. The cubic root of 1220016 is about 106.8534401297.

Adding to 1220016 its reverse (6100221), we get a palindrome (7320237).

The spelling of 1220016 in words is "one million, two hundred twenty thousand, sixteen".