857142819 has 36 divisors (see below), whose sum is σ = 1344268224. Its totient is φ = 526054464.

The previous prime is 857142809. The next prime is 857142833. The reversal of 857142819 is 918241758.

It is not a de Polignac number, because 857142819 - 2⁷ = 857142691 is a prime.

It is a super-2 number, since 2×857142819² = 1469387624326533522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (857142809) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 992782 + ... + 993644.

It is an arithmetic number, because the mean of its divisors is an integer number (37340784).

Almost surely, 2^857142819 is an apocalyptic number.

857142819 is a deficient number, since it is larger than the sum of its proper divisors (487125405).

857142819 is a wasteful number, since it uses less digits than its factorization.

857142819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1532 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 857142819 is about 29277.0015370427. The cubic root of 857142819 is about 949.9142375026.

The spelling of 857142819 in words is "eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred nineteen".