76521 has 8 divisors (see below), whose sum is σ = 106560. Its totient is φ = 48752.

The previous prime is 76519. The next prime is 76537. The reversal of 76521 is 12567.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76521 - 2¹ = 76519 is a prime.

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

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (76511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486 + ... + 623.

It is an arithmetic number, because the mean of its divisors is an integer number (13320).

2⁷⁶⁵²¹ is an apocalyptic number.

It is an amenable number.

76521 is a deficient number, since it is larger than the sum of its proper divisors (30039).

76521 is a wasteful number, since it uses less digits than its factorization.

76521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135.

The product of its digits is 420, while the sum is 21.

The square root of 76521 is about 276.6242939440. The cubic root of 76521 is about 42.4548077867.

The spelling of 76521 in words is "seventy-six thousand, five hundred twenty-one".