1226020105 has 4 divisors (see below), whose sum is σ = 1471224132. Its totient is φ = 980816080.

The previous prime is 1226020079. The next prime is 1226020109. The reversal of 1226020105 is 5010206221.

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 852873616 + 373146489 = 29204^2 + 19317^2 .

It is not a de Polignac number, because 1226020105 - 2⁵ = 1226020073 is a prime.

It is a super-2 number, since 2×1226020105² = 3006250595728422050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226020109) 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, 122602006 + ... + 122602015.

It is an arithmetic number, because the mean of its divisors is an integer number (367806033).

Almost surely, 2^1226020105 is an apocalyptic number.

It is an amenable number.

1226020105 is a deficient number, since it is larger than the sum of its proper divisors (245204027).

1226020105 is an equidigital number, since it uses as much as digits as its factorization.

1226020105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245204026.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1226020105 is about 35014.5698959733. The cubic root of 1226020105 is about 1070.2844048483.

Adding to 1226020105 its reverse (5010206221), we get a palindrome (6236226326).

The spelling of 1226020105 in words is "one billion, two hundred twenty-six million, twenty thousand, one hundred five".