1217108026 has 4 divisors (see below), whose sum is σ = 1825662042. Its totient is φ = 608554012.

The previous prime is 1217108021. The next prime is 1217108027. The reversal of 1217108026 is 6208017121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6208017121 = 83 ⋅74795387.

It can be written as a sum of positive squares in only one way, i.e., 840942001 + 376166025 = 28999^2 + 19395^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1217107985 and 1217108003.

It is not an unprimeable number, because it can be changed into a prime (1217108021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304277005 + ... + 304277008.

Almost surely, 2^1217108026 is an apocalyptic number.

1217108026 is a deficient number, since it is larger than the sum of its proper divisors (608554016).

1217108026 is an equidigital number, since it uses as much as digits as its factorization.

1217108026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608554015.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1217108026 is about 34887.0753431697. The cubic root of 1217108026 is about 1067.6847560697.

The spelling of 1217108026 in words is "one billion, two hundred seventeen million, one hundred eight thousand, twenty-six".