7857057 has 16 divisors (see below), whose sum is σ = 11672640. Its totient is φ = 4667712.

The previous prime is 7857019. The next prime is 7857067. The reversal of 7857057 is 7507587.

It is not a de Polignac number, because 7857057 - 2⁸ = 7856801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (7857067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2343 + ... + 4604.

It is an arithmetic number, because the mean of its divisors is an integer number (729540).

Almost surely, 2^7857057 is an apocalyptic number.

It is an amenable number.

7857057 is a deficient number, since it is larger than the sum of its proper divisors (3815583).

7857057 is a wasteful number, since it uses less digits than its factorization.

7857057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 7857057 is about 2803.0442379670. The cubic root of 7857057 is about 198.8016423692.

The spelling of 7857057 in words is "seven million, eight hundred fifty-seven thousand, fifty-seven".