1220442455 has 8 divisors (see below), whose sum is σ = 1466679312. Its totient is φ = 974921728.

The previous prime is 1220442439. The next prime is 1220442479. The reversal of 1220442455 is 5542440221.

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 1220442455 - 2⁴ = 1220442439 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, 175274 + ... + 182103.

It is an arithmetic number, because the mean of its divisors is an integer number (183334914).

Almost surely, 2^1220442455 is an apocalyptic number.

1220442455 is a deficient number, since it is larger than the sum of its proper divisors (246236857).

1220442455 is an equidigital number, since it uses as much as digits as its factorization.

1220442455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358065.

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 1220442455 is about 34934.8315438904. The cubic root of 1220442455 is about 1068.6588883947.

Adding to 1220442455 its reverse (5542440221), we get a palindrome (6762882676).

The spelling of 1220442455 in words is "one billion, two hundred twenty million, four hundred forty-two thousand, four hundred fifty-five".