6457739 has 8 divisors (see below), whose sum is σ = 7197840. Its totient is φ = 5757696.

The previous prime is 6457729. The next prime is 6457741. The reversal of 6457739 is 9377546.

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

It is a de Polignac number, because none of the positive numbers 2^k-6457739 is a prime.

It is a d-powerful number, because it can be written as 6⁵ + 4⁷ + 5 + 7⁶ + 7⁸ + 3⁹ + 9⁶ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6457696 and 6457705.

It is not an unprimeable number, because it can be changed into a prime (6457729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9674 + ... + 10319.

It is an arithmetic number, because the mean of its divisors is an integer number (899730).

Almost surely, 2^6457739 is an apocalyptic number.

6457739 is a deficient number, since it is larger than the sum of its proper divisors (740101).

6457739 is a wasteful number, since it uses less digits than its factorization.

6457739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20029.

The product of its digits is 158760, while the sum is 41.

The square root of 6457739 is about 2541.2081772259. The cubic root of 6457739 is about 186.2202174500.

The spelling of 6457739 in words is "six million, four hundred fifty-seven thousand, seven hundred thirty-nine".