521412305 has 4 divisors (see below), whose sum is σ = 625694772. Its totient is φ = 417129840.

The previous prime is 521412299. The next prime is 521412317. The reversal of 521412305 is 503214125.

521412305 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 236882881 + 284529424 = 15391^2 + 16868^2 .

It is not a de Polignac number, because 521412305 - 2²⁰ = 520363729 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

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, 52141226 + ... + 52141235.

It is an arithmetic number, because the mean of its divisors is an integer number (156423693).

Almost surely, 2^521412305 is an apocalyptic number.

It is an amenable number.

521412305 is a deficient number, since it is larger than the sum of its proper divisors (104282467).

521412305 is a wasteful number, since it uses less digits than its factorization.

521412305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104282466.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 521412305 is about 22834.4543398786. The cubic root of 521412305 is about 804.8725053028.

The spelling of 521412305 in words is "five hundred twenty-one million, four hundred twelve thousand, three hundred five".