1220424 has 32 divisors (see below), whose sum is σ = 3078240. Its totient is φ = 403200.

The previous prime is 1220423. The next prime is 1220437. The reversal of 1220424 is 4240221.

1220424 is an undulating number in base 15.

It is not an unprimeable number, because it can be changed into a prime (1220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4944 + ... + 5184.

It is an arithmetic number, because the mean of its divisors is an integer number (96195).

2^1220424 is an apocalyptic number.

It is an amenable number.

1220424 is an abundant number, since it is smaller than the sum of its proper divisors (1857816).

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

1220424 is a wasteful number, since it uses less digits than its factorization.

1220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1220424 is about 1104.7280208268. The cubic root of 1220424 is about 106.8653501769.

Adding to 1220424 its reverse (4240221), we get a palindrome (5460645).

The spelling of 1220424 in words is "one million, two hundred twenty thousand, four hundred twenty-four".