505412521 has 4 divisors (see below), whose sum is σ = 532013200. Its totient is φ = 478811844.

The previous prime is 505412503. The next prime is 505412587. The reversal of 505412521 is 125214505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505412521 - 2⁷ = 505412393 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505413521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13300311 + ... + 13300348.

It is an arithmetic number, because the mean of its divisors is an integer number (133003300).

Almost surely, 2^505412521 is an apocalyptic number.

It is an amenable number.

505412521 is a deficient number, since it is larger than the sum of its proper divisors (26600679).

505412521 is a wasteful number, since it uses less digits than its factorization.

505412521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26600678.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 505412521 is about 22481.3816523807. The cubic root of 505412521 is about 796.5542007478.

The spelling of 505412521 in words is "five hundred five million, four hundred twelve thousand, five hundred twenty-one".