1220824 has 16 divisors (see below), whose sum is σ = 2497320. Its totient is φ = 554880.

The previous prime is 1220819. The next prime is 1220833. The reversal of 1220824 is 4280221.

It is a super-2 number, since 2×1220824² = 2980822477952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6849 + ... + 7024.

2^1220824 is an apocalyptic number.

It is an amenable number.

1220824 is an abundant number, since it is smaller than the sum of its proper divisors (1276496).

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

1220824 is a wasteful number, since it uses less digits than its factorization.

1220824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13890 (or 13886 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1220824 is about 1104.9090460305. The cubic root of 1220824 is about 106.8770241172.

The spelling of 1220824 in words is "one million, two hundred twenty thousand, eight hundred twenty-four".