857142523 has 2 divisors, whose sum is σ = 857142524. Its totient is φ = 857142522.

The previous prime is 857142409. The next prime is 857142569. The reversal of 857142523 is 325241758.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857142523 is a prime.

It is not a weakly prime, because it can be changed into another prime (857142593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428571261 + 428571262.

It is an arithmetic number, because the mean of its divisors is an integer number (428571262).

Almost surely, 2^857142523 is an apocalyptic number.

857142523 is a deficient number, since it is larger than the sum of its proper divisors (1).

857142523 is an equidigital number, since it uses as much as digits as its factorization.

857142523 is an odious number, because the sum of its binary digits is odd.

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

The square root of 857142523 is about 29276.9964818798. The cubic root of 857142523 is about 949.9141281569.

It can be divided in two parts, 857 and 142523, that added together give a triangular number (143380 = T₅₃₅).

The spelling of 857142523 in words is "eight hundred fifty-seven million, one hundred forty-two thousand, five hundred twenty-three".