1220424505 has 8 divisors (see below), whose sum is σ = 1528183872. Its totient is φ = 933889968.

The previous prime is 1220424503. The next prime is 1220424529. The reversal of 1220424505 is 5054240221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220424505 - 2¹ = 1220424503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220424505.

It is not an unprimeable number, because it can be changed into a prime (1220424503) 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, 5306079 + ... + 5306308.

It is an arithmetic number, because the mean of its divisors is an integer number (191022984).

Almost surely, 2^1220424505 is an apocalyptic number.

It is an amenable number.

1220424505 is a deficient number, since it is larger than the sum of its proper divisors (307759367).

1220424505 is a wasteful number, since it uses less digits than its factorization.

1220424505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612415.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1220424505 is about 34934.5746360250. The cubic root of 1220424505 is about 1068.6536491688.

Adding to 1220424505 its reverse (5054240221), we get a palindrome (6274664726).

The spelling of 1220424505 in words is "one billion, two hundred twenty million, four hundred twenty-four thousand, five hundred five".