861242 has 16 divisors (see below), whose sum is σ = 1382400. Its totient is φ = 401520.

The previous prime is 861239. The next prime is 861293. The reversal of 861242 is 242168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559 + ... + 2037.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

2⁸⁶¹²⁴² is an apocalyptic number.

861242 is a deficient number, since it is larger than the sum of its proper divisors (521158).

861242 is a wasteful number, since it uses less digits than its factorization.

861242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its digits is 768, while the sum is 23.

The square root of 861242 is about 928.0312494739. The cubic root of 861242 is about 95.1426112936.

The spelling of 861242 in words is "eight hundred sixty-one thousand, two hundred forty-two".