7521696 has 216 divisors, whose sum is σ = 27449604. Its totient is φ = 1935360.

The previous prime is 7521691. The next prime is 7521719. The reversal of 7521696 is 6961257.

It can be written as a sum of positive squares in 2 ways, for example, as 5934096 + 1587600 = 2436^2 + 1260^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

Its product of digits (22680) is a multiple of the sum of its prime factors (84).

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 7521696.

It is not an unprimeable number, because it can be changed into a prime (7521691) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 183436 + ... + 183476.

Almost surely, 2^7521696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7521696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13724802).

7521696 is an abundant number, since it is smaller than the sum of its proper divisors (19927908).

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

7521696 is a wasteful number, since it uses less digits than its factorization.

7521696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 66 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 7521696 is about 2742.5710565088. The cubic root of 7521696 is about 195.9319491647.

The spelling of 7521696 in words is "seven million, five hundred twenty-one thousand, six hundred ninety-six".