1220245567 has 12 divisors (see below), whose sum is σ = 1327875696. Its totient is φ = 1120444160.

The previous prime is 1220245561. The next prime is 1220245597. The reversal of 1220245567 is 7655420221.

It is a de Polignac number, because none of the positive numbers 2^k-1220245567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220245561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39643 + ... + 63340.

It is an arithmetic number, because the mean of its divisors is an integer number (110656308).

Almost surely, 2^1220245567 is an apocalyptic number.

1220245567 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1220245567 is a deficient number, since it is larger than the sum of its proper divisors (107630129).

1220245567 is a wasteful number, since it uses less digits than its factorization.

1220245567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103058 (or 103041 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 1220245567 is about 34932.0134976500. The cubic root of 1220245567 is about 1068.6014181371.

Adding to 1220245567 its reverse (7655420221), we get a palindrome (8875665788).

The spelling of 1220245567 in words is "one billion, two hundred twenty million, two hundred forty-five thousand, five hundred sixty-seven".