1220560445 has 8 divisors (see below), whose sum is σ = 1577339736. Its totient is φ = 901336896.

The previous prime is 1220560433. The next prime is 1220560459. The reversal of 1220560445 is 5440650221.

It can be written as a sum of positive squares in 4 ways, for example, as 5480281 + 1215080164 = 2341^2 + 34858^2 .

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 1220560445 - 2¹² = 1220556349 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 7 ways as a sum of consecutive naturals, for example, 9388862 + ... + 9388991.

It is an arithmetic number, because the mean of its divisors is an integer number (197167467).

Almost surely, 2^1220560445 is an apocalyptic number.

It is an amenable number.

1220560445 is a deficient number, since it is larger than the sum of its proper divisors (356779291).

1220560445 is a wasteful number, since it uses less digits than its factorization.

1220560445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18777871.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1220560445 is about 34936.5202188197. The cubic root of 1220560445 is about 1068.6933259050.

The spelling of 1220560445 in words is "one billion, two hundred twenty million, five hundred sixty thousand, four hundred forty-five".