515478 has 16 divisors (see below), whose sum is σ = 1051056. Its totient is φ = 168480.

The previous prime is 515477. The next prime is 515507. The reversal of 515478 is 874515.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493 + ... + 1128.

It is an arithmetic number, because the mean of its divisors is an integer number (65691).

2⁵¹⁵⁴⁷⁸ is an apocalyptic number.

515478 is an abundant number, since it is smaller than the sum of its proper divisors (535578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515478 is a wasteful number, since it uses less digits than its factorization.

515478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679.

The product of its digits is 5600, while the sum is 30.

The square root of 515478 is about 717.9679658592. The cubic root of 515478 is about 80.1807372016.

It can be divided in two parts, 51 and 5478, that multiplied together give a triangular number (279378 = T₇₄₇).

The spelling of 515478 in words is "five hundred fifteen thousand, four hundred seventy-eight".