512091 has 12 divisors (see below), whose sum is σ = 783432. Its totient is φ = 321216.

The previous prime is 512059. The next prime is 512093. The reversal of 512091 is 190215.

It is not a de Polignac number, because 512091 - 2⁵ = 512059 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1521 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (65286).

2⁵¹²⁰⁹¹ is an apocalyptic number.

512091 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

512091 is a deficient number, since it is larger than the sum of its proper divisors (271341).

512091 is a wasteful number, since it uses less digits than its factorization.

512091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370 (or 3367 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 512091 is about 715.6053381578. The cubic root of 512091 is about 80.0047393026.

The spelling of 512091 in words is "five hundred twelve thousand, ninety-one".