520537401 has 8 divisors (see below), whose sum is σ = 771166560. Its totient is φ = 347024916.

The previous prime is 520537393. The next prime is 520537411. The reversal of 520537401 is 104735025.

It is a happy number.

It is not a de Polignac number, because 520537401 - 2³ = 520537393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 19279163 = 520537401 / (5 + 2 + 0 + 5 + 3 + 7 + 4 + 0 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520537411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9639555 + ... + 9639608.

It is an arithmetic number, because the mean of its divisors is an integer number (96395820).

Almost surely, 2^520537401 is an apocalyptic number.

It is an amenable number.

520537401 is a deficient number, since it is larger than the sum of its proper divisors (250629159).

520537401 is a wasteful number, since it uses less digits than its factorization.

520537401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19279172 (or 19279166 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 520537401 is about 22815.2887555691. The cubic root of 520537401 is about 804.4220745539.

The spelling of 520537401 in words is "five hundred twenty million, five hundred thirty-seven thousand, four hundred one".