511775 has 12 divisors (see below), whose sum is σ = 692664. Its totient is φ = 372000.

The previous prime is 511757. The next prime is 511787. The reversal of 511775 is 577115.

It is not a de Polignac number, because 511775 - 2⁶ = 511711 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 511775.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 656 + ... + 1205.

It is an arithmetic number, because the mean of its divisors is an integer number (57722).

2⁵¹¹⁷⁷⁵ is an apocalyptic number.

511775 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

511775 is a deficient number, since it is larger than the sum of its proper divisors (180889).

511775 is a wasteful number, since it uses less digits than its factorization.

511775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 1877 counting only the distinct ones).

The product of its digits is 1225, while the sum is 26.

The square root of 511775 is about 715.3845119934. The cubic root of 511775 is about 79.9882795330.

It can be divided in two parts, 51 and 1775, that multiplied together give a triangular number (90525 = T₄₂₅).

The spelling of 511775 in words is "five hundred eleven thousand, seven hundred seventy-five".