520992145 has 4 divisors (see below), whose sum is σ = 625190580. Its totient is φ = 416793712.

The previous prime is 520992119. The next prime is 520992151. The reversal of 520992145 is 541299025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146337409 + 374654736 = 12097^2 + 19356^2 .

It is a cyclic number.

It is not a de Polignac number, because 520992145 - 2¹⁷ = 520861073 is a prime.

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, 52099210 + ... + 52099219.

It is an arithmetic number, because the mean of its divisors is an integer number (156297645).

Almost surely, 2^520992145 is an apocalyptic number.

It is an amenable number.

520992145 is a deficient number, since it is larger than the sum of its proper divisors (104198435).

520992145 is a wasteful number, since it uses less digits than its factorization.

520992145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104198434.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 520992145 is about 22825.2523534790. The cubic root of 520992145 is about 804.6562553828.

The spelling of 520992145 in words is "five hundred twenty million, nine hundred ninety-two thousand, one hundred forty-five".