521042545 has 8 divisors (see below), whose sum is σ = 625548096. Its totient is φ = 416636016.

The previous prime is 521042531. The next prime is 521042593. The reversal of 521042545 is 545240125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521042545 - 2²³ = 512653937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12637 + ... + 34666.

It is an arithmetic number, because the mean of its divisors is an integer number (78193512).

Almost surely, 2^521042545 is an apocalyptic number.

It is an amenable number.

521042545 is a deficient number, since it is larger than the sum of its proper divisors (104505551).

521042545 is a wasteful number, since it uses less digits than its factorization.

521042545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49511.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 521042545 is about 22826.3563671472. The cubic root of 521042545 is about 804.6822016266.

The spelling of 521042545 in words is "five hundred twenty-one million, forty-two thousand, five hundred forty-five".