1220064535 has 4 divisors (see below), whose sum is σ = 1464077448. Its totient is φ = 976051624.

The previous prime is 1220064523. The next prime is 1220064541. The reversal of 1220064535 is 5354600221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220064535 is a prime.

It is a Duffinian number.

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, 122006449 + ... + 122006458.

It is an arithmetic number, because the mean of its divisors is an integer number (366019362).

Almost surely, 2^1220064535 is an apocalyptic number.

1220064535 is a deficient number, since it is larger than the sum of its proper divisors (244012913).

1220064535 is an equidigital number, since it uses as much as digits as its factorization.

1220064535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244012912.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1220064535 is about 34929.4221967670. The cubic root of 1220064535 is about 1068.5485706817.

Adding to 1220064535 its reverse (5354600221), we get a palindrome (6574664756).

The spelling of 1220064535 in words is "one billion, two hundred twenty million, sixty-four thousand, five hundred thirty-five".