515425 has 12 divisors (see below), whose sum is σ = 652860. Its totient is φ = 403520.

The previous prime is 515401. The next prime is 515429. The reversal of 515425 is 524515.

515425 = 76² + 77² + ... + 125².

It can be written as a sum of positive squares in 6 ways, for example, as 14161 + 501264 = 119^2 + 708^2 .

It is a de Polignac number, because none of the positive numbers 2^k-515425 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 515396 and 515405.

It is not an unprimeable number, because it can be changed into a prime (515429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1131 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (54405).

2⁵¹⁵⁴²⁵ is an apocalyptic number.

It is an amenable number.

515425 is a deficient number, since it is larger than the sum of its proper divisors (137435).

515425 is a wasteful number, since it uses less digits than its factorization.

515425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 447 counting only the distinct ones).

The product of its digits is 1000, while the sum is 22.

The square root of 515425 is about 717.9310551857. The cubic root of 515425 is about 80.1779891214.

It can be divided in two parts, 51 and 5425, that added together give a square (5476 = 74²).

The spelling of 515425 in words is "five hundred fifteen thousand, four hundred twenty-five".