1220301264 has 160 divisors (see below), whose sum is σ = 3896139520. Its totient is φ = 320495616.

The previous prime is 1220301253. The next prime is 1220301281. The reversal of 1220301264 is 4621030221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1220301264.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1471602 + ... + 1472430.

It is an arithmetic number, because the mean of its divisors is an integer number (24350872).

Almost surely, 2^1220301264 is an apocalyptic number.

1220301264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220301264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1948069760).

1220301264 is an abundant number, since it is smaller than the sum of its proper divisors (2675838256).

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

1220301264 is a wasteful number, since it uses less digits than its factorization.

1220301264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1220301264 is about 34932.8107085588. The cubic root of 1220301264 is about 1068.6176763366.

Adding to 1220301264 its reverse (4621030221), we get a palindrome (5841331485).

The spelling of 1220301264 in words is "one billion, two hundred twenty million, three hundred one thousand, two hundred sixty-four".