1220504255 has 8 divisors (see below), whose sum is σ = 1511850624. Its totient is φ = 944906400.

The previous prime is 1220504231. The next prime is 1220504279. The reversal of 1220504255 is 5524050221.

It is an interprime number because it is at equal distance from previous prime (1220504231) and next prime (1220504279).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220504255 - 2⁶ = 1220504191 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, 3936956 + ... + 3937265.

It is an arithmetic number, because the mean of its divisors is an integer number (188981328).

Almost surely, 2^1220504255 is an apocalyptic number.

1220504255 is a deficient number, since it is larger than the sum of its proper divisors (291346369).

1220504255 is an equidigital number, since it uses as much as digits as its factorization.

1220504255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7874257.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 1220504255 is about 34935.7160367438. The cubic root of 1220504255 is about 1068.6769261165.

Adding to 1220504255 its reverse (5524050221), we get a palindrome (6744554476).

The spelling of 1220504255 in words is "one billion, two hundred twenty million, five hundred four thousand, two hundred fifty-five".