857481 has 4 divisors (see below), whose sum is σ = 1143312. Its totient is φ = 571652.

The previous prime is 857471. The next prime is 857513. The reversal of 857481 is 184758.

It is a happy number.

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 857481 - 2⁹ = 856969 is a prime.

It is a super-2 number, since 2×857481² = 1470547330722, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

857481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (857411) 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, 142911 + ... + 142916.

It is an arithmetic number, because the mean of its divisors is an integer number (285828).

2⁸⁵⁷⁴⁸¹ is an apocalyptic number.

It is an amenable number.

857481 is a deficient number, since it is larger than the sum of its proper divisors (285831).

857481 is a wasteful number, since it uses less digits than its factorization.

857481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285830.

The product of its digits is 8960, while the sum is 33.

The square root of 857481 is about 926.0026997801. The cubic root of 857481 is about 95.0039148895.

The spelling of 857481 in words is "eight hundred fifty-seven thousand, four hundred eighty-one".