512738 has 4 divisors (see below), whose sum is σ = 769110. Its totient is φ = 256368.

The previous prime is 512717. The next prime is 512741. The reversal of 512738 is 837215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 837215 = 5 ⋅167443.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 124609 = 623^2 + 353^2 .

It is a Curzon number.

It is a zygodrome in base 3.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 512738.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 128183 + ... + 128186.

2⁵¹²⁷³⁸ is an apocalyptic number.

512738 is a deficient number, since it is larger than the sum of its proper divisors (256372).

512738 is a wasteful number, since it uses less digits than its factorization.

512738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256371.

The product of its digits is 1680, while the sum is 26.

The square root of 512738 is about 716.0572602802. The cubic root of 512738 is about 80.0384190468.

The spelling of 512738 in words is "five hundred twelve thousand, seven hundred thirty-eight".