7413521 has 4 divisors (see below), whose sum is σ = 7735872. Its totient is φ = 7091172.

The previous prime is 7413503. The next prime is 7413533. The reversal of 7413521 is 1253147.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1253147 = 7 ⋅179021.

It is a cyclic number.

It is not a de Polignac number, because 7413521 - 2⁶ = 7413457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 322327 = 7413521 / (7 + 4 + 1 + 3 + 5 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7413551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161141 + ... + 161186.

It is an arithmetic number, because the mean of its divisors is an integer number (1933968).

Almost surely, 2^7413521 is an apocalyptic number.

It is an amenable number.

7413521 is a deficient number, since it is larger than the sum of its proper divisors (322351).

7413521 is a wasteful number, since it uses less digits than its factorization.

7413521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322350.

The product of its digits is 840, while the sum is 23.

The square root of 7413521 is about 2722.7781767893. The cubic root of 7413521 is about 194.9881298933.

Adding to 7413521 its reverse (1253147), we get a palindrome (8666668).

The spelling of 7413521 in words is "seven million, four hundred thirteen thousand, five hundred twenty-one".