1220202755 has 8 divisors (see below), whose sum is σ = 1465103472. Its totient is φ = 975588768.

The previous prime is 1220202751. The next prime is 1220202769. The reversal of 1220202755 is 5572020221.

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 1220202755 - 2² = 1220202751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220202751) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 62204 + ... + 79433.

It is an arithmetic number, because the mean of its divisors is an integer number (183137934).

Almost surely, 2^1220202755 is an apocalyptic number.

1220202755 is a deficient number, since it is larger than the sum of its proper divisors (244900717).

1220202755 is a wasteful number, since it uses less digits than its factorization.

1220202755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143365.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 1220202755 is about 34931.4007019472. The cubic root of 1220202755 is about 1068.5889207895.

Adding to 1220202755 its reverse (5572020221), we get a palindrome (6792222976).

The spelling of 1220202755 in words is "one billion, two hundred twenty million, two hundred two thousand, seven hundred fifty-five".