501257065 has 4 divisors (see below), whose sum is σ = 601508484. Its totient is φ = 401005648.

The previous prime is 501257059. The next prime is 501257077. The reversal of 501257065 is 560752105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560752105 = 5 ⋅112150421.

It can be written as a sum of positive squares in 2 ways, for example, as 274332969 + 226924096 = 16563^2 + 15064^2 .

It is a cyclic number.

It is not a de Polignac number, because 501257065 - 2⁷ = 501256937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50125702 + ... + 50125711.

It is an arithmetic number, because the mean of its divisors is an integer number (150377121).

Almost surely, 2^501257065 is an apocalyptic number.

It is an amenable number.

501257065 is a deficient number, since it is larger than the sum of its proper divisors (100251419).

501257065 is a wasteful number, since it uses less digits than its factorization.

501257065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100251418.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 501257065 is about 22388.7709577815. The cubic root of 501257065 is about 794.3651247668.

The spelling of 501257065 in words is "five hundred one million, two hundred fifty-seven thousand, sixty-five".