851241 has 8 divisors (see below), whose sum is σ = 1201824. Its totient is φ = 534080.

The previous prime is 851239. The next prime is 851251. The reversal of 851241 is 142158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851241 - 2¹ = 851239 is a prime.

It is a super-2 number, since 2×851241² = 1449222480162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (851231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8295 + ... + 8396.

It is an arithmetic number, because the mean of its divisors is an integer number (150228).

2⁸⁵¹²⁴¹ is an apocalyptic number.

It is an amenable number.

851241 is a deficient number, since it is larger than the sum of its proper divisors (350583).

851241 is a wasteful number, since it uses less digits than its factorization.

851241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16711.

The product of its digits is 320, while the sum is 21.

The square root of 851241 is about 922.6272269991. The cubic root of 851241 is about 94.7729016888.

Adding to 851241 its reverse (142158), we get a palindrome (993399).

It can be divided in two parts, 85 and 1241, that added together give a triangular number (1326 = T₅₁).

The spelling of 851241 in words is "eight hundred fifty-one thousand, two hundred forty-one".