431085 has 16 divisors (see below), whose sum is σ = 714240. Its totient is φ = 221760.

The previous prime is 431083. The next prime is 431099. The reversal of 431085 is 580134.

431085 = T₃₀₅ + T₃₀₆ + ... + T₃₁₃.

It is not a de Polignac number, because 431085 - 2¹ = 431083 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61 + ... + 930.

It is an arithmetic number, because the mean of its divisors is an integer number (44640).

2⁴³¹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

431085 is a deficient number, since it is larger than the sum of its proper divisors (283155).

431085 is a wasteful number, since it uses less digits than its factorization.

431085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 431085 is about 656.5706359563. The cubic root of 431085 is about 75.5418536123.

It can be divided in two parts, 43 and 1085, that added together give a triangular number (1128 = T₄₇).

The spelling of 431085 in words is "four hundred thirty-one thousand, eighty-five".