6457642 has 8 divisors (see below), whose sum is σ = 9701316. Its totient is φ = 3223872.

The previous prime is 6457631. The next prime is 6457657. The reversal of 6457642 is 2467546.

It can be written as a sum of positive squares in 2 ways, for example, as 6456681 + 961 = 2541^2 + 31^2 .

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

It is a super-2 number, since 2×6457642² = 83402280400328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6457598 and 6457607.

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, 543 + ... + 3634.

Almost surely, 2^6457642 is an apocalyptic number.

6457642 is a deficient number, since it is larger than the sum of its proper divisors (3243674).

6457642 is a wasteful number, since it uses less digits than its factorization.

6457642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952.

The product of its digits is 40320, while the sum is 34.

The square root of 6457642 is about 2541.1890917443. The cubic root of 6457642 is about 186.2192850571.

The spelling of 6457642 in words is "six million, four hundred fifty-seven thousand, six hundred forty-two".