9857142 has 12 divisors (see below), whose sum is σ = 21357180. Its totient is φ = 3285708.

The previous prime is 9857137. The next prime is 9857147. The reversal of 9857142 is 2417589.

9857142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9857137) and next prime (9857147).

It is a junction number, because it is equal to n+sod(n) for n = 9857097 and 9857106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9857147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273792 + ... + 273827.

It is an arithmetic number, because the mean of its divisors is an integer number (1779765).

Almost surely, 2^9857142 is an apocalyptic number.

9857142 is an abundant number, since it is smaller than the sum of its proper divisors (11500038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9857142 is a wasteful number, since it uses less digits than its factorization.

9857142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547627 (or 547624 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 9857142 is about 3139.6085743290. The cubic root of 9857142 is about 214.4126170222.

It can be divided in two parts, 9857 and 142, that added together give a palindrome (9999).

The spelling of 9857142 in words is "nine million, eight hundred fifty-seven thousand, one hundred forty-two".