863142 has 16 divisors (see below), whose sum is σ = 1972992. Its totient is φ = 246600.

The previous prime is 863131. The next prime is 863143. The reversal of 863142 is 241368.

It is a happy number.

It is a super-2 number, since 2×863142² = 1490028224328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863143) by changing a digit.

863142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10234 + ... + 10317.

It is an arithmetic number, because the mean of its divisors is an integer number (123312).

2⁸⁶³¹⁴² is an apocalyptic number.

863142 is an abundant number, since it is smaller than the sum of its proper divisors (1109850).

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

863142 is a wasteful number, since it uses less digits than its factorization.

863142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20563.

The product of its digits is 1152, while the sum is 24.

The square root of 863142 is about 929.0543579361. The cubic root of 863142 is about 95.2125251275.

The spelling of 863142 in words is "eight hundred sixty-three thousand, one hundred forty-two".