7857345 has 16 divisors (see below), whose sum is σ = 12640320. Its totient is φ = 4167744.

The previous prime is 7857337. The next prime is 7857359. The reversal of 7857345 is 5437587.

7857345 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7857345 - 2³ = 7857337 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1626 + ... + 4284.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^7857345 is an apocalyptic number.

It is an amenable number.

7857345 is a deficient number, since it is larger than the sum of its proper divisors (4782975).

7857345 is a wasteful number, since it uses less digits than its factorization.

7857345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864.

The product of its digits is 117600, while the sum is 39.

The square root of 7857345 is about 2803.0956102138. The cubic root of 7857345 is about 198.8040713607.

The spelling of 7857345 in words is "seven million, eight hundred fifty-seven thousand, three hundred forty-five".