861241 has 4 divisors (see below), whose sum is σ = 864000. Its totient is φ = 858484.

The previous prime is 861239. The next prime is 861293. The reversal of 861241 is 142168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 861241 - 2¹ = 861239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841 + ... + 1558.

It is an arithmetic number, because the mean of its divisors is an integer number (216000).

2⁸⁶¹²⁴¹ is an apocalyptic number.

It is an amenable number.

861241 is a deficient number, since it is larger than the sum of its proper divisors (2759).

861241 is a wasteful number, since it uses less digits than its factorization.

861241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758.

The product of its digits is 384, while the sum is 22.

The square root of 861241 is about 928.0307106987. The cubic root of 861241 is about 95.1425744698.

The spelling of 861241 in words is "eight hundred sixty-one thousand, two hundred forty-one".