5171246642 has 4 divisors (see below), whose sum is σ = 7756869966. Its totient is φ = 2585623320.

The previous prime is 5171246629. The next prime is 5171246659. The reversal of 5171246642 is 2466421715.

It is a happy number.

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., 4795701001 + 375545641 = 69251^2 + 19379^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5171246596 and 5171246605.

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 as a sum of consecutive naturals, namely, 1292811659 + ... + 1292811662.

Almost surely, 2^5171246642 is an apocalyptic number.

5171246642 is a deficient number, since it is larger than the sum of its proper divisors (2585623324).

5171246642 is a wasteful number, since it uses less digits than its factorization.

5171246642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585623323.

The product of its digits is 80640, while the sum is 38.

The square root of 5171246642 is about 71911.3804762501. The cubic root of 5171246642 is about 1729.2790654426.

The spelling of 5171246642 in words is "five billion, one hundred seventy-one million, two hundred forty-six thousand, six hundred forty-two".