413865521 has 4 divisors (see below), whose sum is σ = 423959844. Its totient is φ = 403771200.

The previous prime is 413865449. The next prime is 413865539. The reversal of 413865521 is 125568314.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125568314 = 2 ⋅62784157.

It can be written as a sum of positive squares in 2 ways, for example, as 47679025 + 366186496 = 6905^2 + 19136^2 .

It is a cyclic number.

It is not a de Polignac number, because 413865521 - 2¹⁰ = 413864497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (413865421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5047100 + ... + 5047181.

It is an arithmetic number, because the mean of its divisors is an integer number (105989961).

Almost surely, 2^413865521 is an apocalyptic number.

413865521 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

413865521 is a deficient number, since it is larger than the sum of its proper divisors (10094323).

413865521 is a wasteful number, since it uses less digits than its factorization.

413865521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10094322.

The product of its digits is 28800, while the sum is 35.

The square root of 413865521 is about 20343.6850398348. The cubic root of 413865521 is about 745.2232839730.

The spelling of 413865521 in words is "four hundred thirteen million, eight hundred sixty-five thousand, five hundred twenty-one".