1220005263 has 8 divisors (see below), whose sum is σ = 1682766000. Its totient is φ = 785290688.

The previous prime is 1220005253. The next prime is 1220005271. The reversal of 1220005263 is 3625000221.

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 1220005263 - 2⁴ = 1220005247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220005223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7011438 + ... + 7011611.

It is an arithmetic number, because the mean of its divisors is an integer number (210345750).

Almost surely, 2^1220005263 is an apocalyptic number.

1220005263 is a deficient number, since it is larger than the sum of its proper divisors (462760737).

1220005263 is a wasteful number, since it uses less digits than its factorization.

1220005263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023081.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1220005263 is about 34928.5737326905. The cubic root of 1220005263 is about 1068.5312666691.

Adding to 1220005263 its reverse (3625000221), we get a palindrome (4845005484).

The spelling of 1220005263 in words is "one billion, two hundred twenty million, five thousand, two hundred sixty-three".