521416 has 16 divisors (see below), whose sum is σ = 1117440. Its totient is φ = 223440.

The previous prime is 521401. The next prime is 521429. The reversal of 521416 is 614125.

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

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 521393 and 521402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4600 + ... + 4711.

It is an arithmetic number, because the mean of its divisors is an integer number (69840).

2⁵²¹⁴¹⁶ is an apocalyptic number.

521416 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

521416 is an abundant number, since it is smaller than the sum of its proper divisors (596024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521416 is a wasteful number, since it uses less digits than its factorization.

521416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324 (or 9320 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 521416 is about 722.0914069562. The cubic root of 521416 is about 80.4874406547.

The spelling of 521416 in words is "five hundred twenty-one thousand, four hundred sixteen".