857144067 has 16 divisors (see below), whose sum is σ = 1231964160. Its totient is φ = 526961952.

The previous prime is 857144051. The next prime is 857144111. The reversal of 857144067 is 760441758.

It is not a de Polignac number, because 857144067 - 2⁴ = 857144051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857144767) 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, 32284 + ... + 52502.

It is an arithmetic number, because the mean of its divisors is an integer number (76997760).

Almost surely, 2^857144067 is an apocalyptic number.

857144067 is a deficient number, since it is larger than the sum of its proper divisors (374820093).

857144067 is a wasteful number, since it uses less digits than its factorization.

857144067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21322.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 857144067 is about 29277.0228506930. The cubic root of 857144067 is about 949.9146985274.

The spelling of 857144067 in words is "eight hundred fifty-seven million, one hundred forty-four thousand, sixty-seven".