1016521 has 12 divisors (see below), whose sum is σ = 1157632. Its totient is φ = 891000.

The previous prime is 1016497. The next prime is 1016527. The reversal of 1016521 is 1256101.

It is a happy number.

1016521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1016521 - 2⁵ = 1016489 is a prime.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

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

It is a Duffinian number.

1016521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1016495 and 1016504.

It is not an unprimeable number, because it can be changed into a prime (1016527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3616 + ... + 3886.

2^1016521 is an apocalyptic number.

1016521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1016521 is a deficient number, since it is larger than the sum of its proper divisors (141111).

1016521 is a wasteful number, since it uses less digits than its factorization.

1016521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1016521 is about 1008.2266610242. The cubic root of 1016521 is about 100.5476948274.

The spelling of 1016521 in words is "one million, sixteen thousand, five hundred twenty-one".