1220262017 has 4 divisors (see below), whose sum is σ = 1314128340. Its totient is φ = 1126395696.

The previous prime is 1220262011. The next prime is 1220262053. The reversal of 1220262017 is 7102620221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 376010881 + 844251136 = 19391^2 + 29056^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220262017 - 2⁶ = 1220261953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220261983 and 1220262001.

It is not an unprimeable number, because it can be changed into a prime (1220262011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46933142 + ... + 46933167.

It is an arithmetic number, because the mean of its divisors is an integer number (328532085).

Almost surely, 2^1220262017 is an apocalyptic number.

It is an amenable number.

1220262017 is a deficient number, since it is larger than the sum of its proper divisors (93866323).

1220262017 is an equidigital number, since it uses as much as digits as its factorization.

1220262017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93866322.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1220262017 is about 34932.2489542257. The cubic root of 1220262017 is about 1068.6062200160.

Adding to 1220262017 its reverse (7102620221), we get a palindrome (8322882238).

The spelling of 1220262017 in words is "one billion, two hundred twenty million, two hundred sixty-two thousand, seventeen".