863541 has 20 divisors (see below), whose sum is σ = 1475232. Its totient is φ = 493128.

The previous prime is 863539. The next prime is 863561. The reversal of 863541 is 145368.

It is not a de Polignac number, because 863541 - 2¹ = 863539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863521) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 195 + ... + 1328.

2⁸⁶³⁵⁴¹ is an apocalyptic number.

863541 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

863541 is a deficient number, since it is larger than the sum of its proper divisors (611691).

863541 is a wasteful number, since it uses less digits than its factorization.

863541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542 (or 1533 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 863541 is about 929.2690676010. The cubic root of 863541 is about 95.2271939943.

The spelling of 863541 in words is "eight hundred sixty-three thousand, five hundred forty-one".