4257712642 has 4 divisors (see below), whose sum is σ = 6386568966. Its totient is φ = 2128856320.

The previous prime is 4257712637. The next prime is 4257712651. The reversal of 4257712642 is 2462177524.

4257712642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 4015630161 + 242082481 = 63369^2 + 15559^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 4257712595 and 4257712604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064428159 + ... + 1064428162.

Almost surely, 2^4257712642 is an apocalyptic number.

4257712642 is a deficient number, since it is larger than the sum of its proper divisors (2128856324).

4257712642 is a wasteful number, since it uses less digits than its factorization.

4257712642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128856323.

The product of its digits is 188160, while the sum is 40.

The square root of 4257712642 is about 65251.1505032670. The cubic root of 4257712642 is about 1620.7851503220.

The spelling of 4257712642 in words is "four billion, two hundred fifty-seven million, seven hundred twelve thousand, six hundred forty-two".