520542137 has 2 divisors, whose sum is σ = 520542138. Its totient is φ = 520542136.

The previous prime is 520542131. The next prime is 520542161. The reversal of 520542137 is 731245025.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352087696 + 168454441 = 18764^2 + 12979^2 .

It is a cyclic number.

It is not a de Polignac number, because 520542137 - 2¹⁰ = 520541113 is a prime.

It is not a weakly prime, because it can be changed into another prime (520542131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260271068 + 260271069.

It is an arithmetic number, because the mean of its divisors is an integer number (260271069).

Almost surely, 2^520542137 is an apocalyptic number.

It is an amenable number.

520542137 is a deficient number, since it is larger than the sum of its proper divisors (1).

520542137 is an equidigital number, since it uses as much as digits as its factorization.

520542137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 520542137 is about 22815.3925453848. The cubic root of 520542137 is about 804.4245141681.

The spelling of 520542137 in words is "five hundred twenty million, five hundred forty-two thousand, one hundred thirty-seven".