1688126042 has 8 divisors (see below), whose sum is σ = 2546826516. Its totient is φ = 839183872.

The previous prime is 1688126023. The next prime is 1688126051. The reversal of 1688126042 is 2406218861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1687648561 + 477481 = 41081^2 + 691^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1688125987 and 1688126005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2439143 + ... + 2439834.

Almost surely, 2^1688126042 is an apocalyptic number.

1688126042 is a deficient number, since it is larger than the sum of its proper divisors (858700474).

1688126042 is a wasteful number, since it uses less digits than its factorization.

1688126042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879152.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 1688126042 is about 41086.8110468554. The cubic root of 1688126042 is about 1190.6979974000.

The spelling of 1688126042 in words is "one billion, six hundred eighty-eight million, one hundred twenty-six thousand, forty-two".