1220202445 has 16 divisors (see below), whose sum is σ = 1825550208. Its totient is φ = 760645440.

The previous prime is 1220202433. The next prime is 1220202449. The reversal of 1220202445 is 5442020221.

It is a de Polignac number, because none of the positive numbers 2^k-1220202445 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 (1220202449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1584294 + ... + 1585063.

It is an arithmetic number, because the mean of its divisors is an integer number (114096888).

Almost surely, 2^1220202445 is an apocalyptic number.

It is an amenable number.

1220202445 is a deficient number, since it is larger than the sum of its proper divisors (605347763).

1220202445 is a wasteful number, since it uses less digits than its factorization.

1220202445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169380.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1220202445 is about 34931.3962646786. The cubic root of 1220202445 is about 1068.5888302956.

Adding to 1220202445 its reverse (5442020221), we get a palindrome (6662222666).

The spelling of 1220202445 in words is "one billion, two hundred twenty million, two hundred two thousand, four hundred forty-five".