1205122426 has 4 divisors (see below), whose sum is σ = 1807683642. Its totient is φ = 602561212.

The previous prime is 1205122417. The next prime is 1205122439. The reversal of 1205122426 is 6242215021.

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

It can be written as a sum of positive squares in only one way, i.e., 1112289201 + 92833225 = 33351^2 + 9635^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1205122426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301280605 + ... + 301280608.

Almost surely, 2^1205122426 is an apocalyptic number.

1205122426 is a deficient number, since it is larger than the sum of its proper divisors (602561216).

1205122426 is an equidigital number, since it uses as much as digits as its factorization.

1205122426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602561215.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1205122426 is about 34714.8732678084. The cubic root of 1205122426 is about 1064.1684755219.

Adding to 1205122426 its reverse (6242215021), we get a palindrome (7447337447).

The spelling of 1205122426 in words is "one billion, two hundred five million, one hundred twenty-two thousand, four hundred twenty-six".