6857245 has 4 divisors (see below), whose sum is σ = 8228700. Its totient is φ = 5485792.

The previous prime is 6857219. The next prime is 6857269. The reversal of 6857245 is 5427586.

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 2 ways, for example, as 5067001 + 1790244 = 2251^2 + 1338^2 .

It is a cyclic number.

It is not a de Polignac number, because 6857245 - 2⁷ = 6857117 is a prime.

6857245 is a lucky number.

It is a congruent number.

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, 685720 + ... + 685729.

It is an arithmetic number, because the mean of its divisors is an integer number (2057175).

Almost surely, 2^6857245 is an apocalyptic number.

It is an amenable number.

6857245 is a deficient number, since it is larger than the sum of its proper divisors (1371455).

6857245 is a wasteful number, since it uses less digits than its factorization.

6857245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371454.

The product of its digits is 67200, while the sum is 37.

The square root of 6857245 is about 2618.6341859832. The cubic root of 6857245 is about 189.9837936315.

It can be divided in two parts, 685 and 7245, that multiplied together give a triangular number (4962825 = T₃₁₅₀).

The spelling of 6857245 in words is "six million, eight hundred fifty-seven thousand, two hundred forty-five".