7634521 has 6 divisors (see below), whose sum is σ = 7818090. Its totient is φ = 7455168.

The previous prime is 7634519. The next prime is 7634527. The reversal of 7634521 is 1254367.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 978121 = 2580^2 + 989^2 .

It is not a de Polignac number, because 7634521 - 2¹ = 7634519 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7634521.

It is not an unprimeable number, because it can be changed into a prime (7634527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216 + ... + 3913.

It is an arithmetic number, because the mean of its divisors is an integer number (1303015).

Almost surely, 2^7634521 is an apocalyptic number.

It is an amenable number.

7634521 is a deficient number, since it is larger than the sum of its proper divisors (183569).

7634521 is an equidigital number, since it uses as much as digits as its factorization.

7634521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215 (or 4172 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 7634521 is about 2763.0636981438. The cubic root of 7634521 is about 196.9067472445.

Adding to 7634521 its reverse (1254367), we get a palindrome (8888888).

The spelling of 7634521 in words is "seven million, six hundred thirty-four thousand, five hundred twenty-one".