520741237 has 4 divisors (see below), whose sum is σ = 523859616. Its totient is φ = 517622860.

The previous prime is 520741231. The next prime is 520741259. The reversal of 520741237 is 732147025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520741237 - 2²³ = 512352629 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520741199 and 520741208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520741231) 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, 1558939 + ... + 1559272.

It is an arithmetic number, because the mean of its divisors is an integer number (130964904).

Almost surely, 2^520741237 is an apocalyptic number.

It is an amenable number.

520741237 is a deficient number, since it is larger than the sum of its proper divisors (3118379).

520741237 is a wasteful number, since it uses less digits than its factorization.

520741237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118378.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 520741237 is about 22819.7554106086. The cubic root of 520741237 is about 804.5270614254.

The spelling of 520741237 in words is "five hundred twenty million, seven hundred forty-one thousand, two hundred thirty-seven".