851479 has 4 divisors (see below), whose sum is σ = 901584. Its totient is φ = 801376.

The previous prime is 851471. The next prime is 851491. The reversal of 851479 is 974158.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974158 = 2 ⋅487079.

It is a cyclic number.

It is not a de Polignac number, because 851479 - 2³ = 851471 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 (851471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25027 + ... + 25060.

It is an arithmetic number, because the mean of its divisors is an integer number (225396).

2⁸⁵¹⁴⁷⁹ is an apocalyptic number.

851479 is a deficient number, since it is larger than the sum of its proper divisors (50105).

851479 is a wasteful number, since it uses less digits than its factorization.

851479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50104.

The product of its digits is 10080, while the sum is 34.

The square root of 851479 is about 922.7561974866. The cubic root of 851479 is about 94.7817334410.

The spelling of 851479 in words is "eight hundred fifty-one thousand, four hundred seventy-nine".