857143245 has 32 divisors (see below), whose sum is σ = 1570924800. Its totient is φ = 390942720.

The previous prime is 857143229. The next prime is 857143249. The reversal of 857143245 is 542341758.

It is not a de Polignac number, because 857143245 - 2⁴ = 857143229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857143249) 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 in 31 ways as a sum of consecutive naturals, for example, 38055 + ... + 56235.

It is an arithmetic number, because the mean of its divisors is an integer number (49091400).

Almost surely, 2^857143245 is an apocalyptic number.

It is an amenable number.

857143245 is a deficient number, since it is larger than the sum of its proper divisors (713781555).

857143245 is a wasteful number, since it uses less digits than its factorization.

857143245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18645.

The product of its digits is 134400, while the sum is 39.

The square root of 857143245 is about 29277.0088123770. The cubic root of 857143245 is about 949.9143948717.

The spelling of 857143245 in words is "eight hundred fifty-seven million, one hundred forty-three thousand, two hundred forty-five".