515387 has 4 divisors (see below), whose sum is σ = 517440. Its totient is φ = 513336.

The previous prime is 515381. The next prime is 515401. The reversal of 515387 is 783515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783515 = 5 ⋅156703.

It is not a de Polignac number, because 515387 - 2⁴ = 515371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (129360).

2⁵¹⁵³⁸⁷ is an apocalyptic number.

515387 is a deficient number, since it is larger than the sum of its proper divisors (2053).

515387 is a wasteful number, since it uses less digits than its factorization.

515387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052.

The product of its digits is 4200, while the sum is 29.

The square root of 515387 is about 717.9045897611. The cubic root of 515387 is about 80.1760186838.

The spelling of 515387 in words is "five hundred fifteen thousand, three hundred eighty-seven".