1205120426 has 8 divisors (see below), whose sum is σ = 1807863300. Its totient is φ = 602499328.

The previous prime is 1205120419. The next prime is 1205120437. The reversal of 1205120426 is 6240215021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1200276025 + 4844401 = 34645^2 + 2201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650 + ... + 49098.

Almost surely, 2^1205120426 is an apocalyptic number.

1205120426 is a deficient number, since it is larger than the sum of its proper divisors (602742874).

1205120426 is a wasteful number, since it uses less digits than its factorization.

1205120426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60888.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1205120426 is about 34714.8444616997. The cubic root of 1205120426 is about 1064.1678868299.

Adding to 1205120426 its reverse (6240215021), we get a palindrome (7445335447).

The spelling of 1205120426 in words is "one billion, two hundred five million, one hundred twenty thousand, four hundred twenty-six".