6858457 has 4 divisors (see below), whose sum is σ = 7018000. Its totient is φ = 6698916.

The previous prime is 6858443. The next prime is 6858469. The reversal of 6858457 is 7548586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6858457 - 2⁷ = 6858329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 159499 = 6858457 / (6 + 8 + 5 + 8 + 4 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6858407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79707 + ... + 79792.

It is an arithmetic number, because the mean of its divisors is an integer number (1754500).

Almost surely, 2^6858457 is an apocalyptic number.

It is an amenable number.

6858457 is a deficient number, since it is larger than the sum of its proper divisors (159543).

6858457 is a wasteful number, since it uses less digits than its factorization.

6858457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159542.

The product of its digits is 268800, while the sum is 43.

The square root of 6858457 is about 2618.8655941075. The cubic root of 6858457 is about 189.9949860173.

The spelling of 6858457 in words is "six million, eight hundred fifty-eight thousand, four hundred fifty-seven".