7521541 has 2 divisors, whose sum is σ = 7521542. Its totient is φ = 7521540.

The previous prime is 7521539. The next prime is 7521559. The reversal of 7521541 is 1451257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 1833316 = 2385^2 + 1354^2 .

It is an emirp because it is prime and its reverse (1451257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7521541 - 2¹ = 7521539 is a prime.

Together with 7521539, it forms a pair of twin primes.

7521541 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7521581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3760770 + 3760771.

It is an arithmetic number, because the mean of its divisors is an integer number (3760771).

Almost surely, 2^7521541 is an apocalyptic number.

It is an amenable number.

7521541 is a deficient number, since it is larger than the sum of its proper divisors (1).

7521541 is an equidigital number, since it uses as much as digits as its factorization.

7521541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 25.

The square root of 7521541 is about 2742.5427982075. The cubic root of 7521541 is about 195.9306032954.

Adding to 7521541 its reverse (1451257), we get a palindrome (8972798).

The spelling of 7521541 in words is "seven million, five hundred twenty-one thousand, five hundred forty-one".