1220104405 has 8 divisors (see below), whose sum is σ = 1576750392. Its totient is φ = 901000128.

The previous prime is 1220104387. The next prime is 1220104411. The reversal of 1220104405 is 5044010221.

It can be written as a sum of positive squares in 4 ways, for example, as 3908529 + 1216195876 = 1977^2 + 34874^2 .

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 1220104405 - 2⁵ = 1220104373 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, 9385354 + ... + 9385483.

It is an arithmetic number, because the mean of its divisors is an integer number (197093799).

Almost surely, 2^1220104405 is an apocalyptic number.

It is an amenable number.

1220104405 is a deficient number, since it is larger than the sum of its proper divisors (356645987).

1220104405 is a wasteful number, since it uses less digits than its factorization.

1220104405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18770855.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1220104405 is about 34929.9929143995. The cubic root of 1220104405 is about 1068.5602101118.

Adding to 1220104405 its reverse (5044010221), we get a palindrome (6264114626).

It can be divided in two parts, 1220 and 104405, that added together give a square (105625 = 325²).

The spelling of 1220104405 in words is "one billion, two hundred twenty million, one hundred four thousand, four hundred five".