851975 has 12 divisors (see below), whose sum is σ = 1078056. Its totient is φ = 667680.

The previous prime is 851971. The next prime is 852011. The reversal of 851975 is 579158.

851975 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 851975 - 2² = 851971 is a prime.

It is a super-2 number, since 2×851975² = 1451722801250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1004 + ... + 1646.

It is an arithmetic number, because the mean of its divisors is an integer number (89838).

2⁸⁵¹⁹⁷⁵ is an apocalyptic number.

851975 is a deficient number, since it is larger than the sum of its proper divisors (226081).

851975 is a wasteful number, since it uses less digits than its factorization.

851975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 701 counting only the distinct ones).

The product of its digits is 12600, while the sum is 35.

The square root of 851975 is about 923.0249184069. The cubic root of 851975 is about 94.8001338221.

The spelling of 851975 in words is "eight hundred fifty-one thousand, nine hundred seventy-five".