7371521 has 4 divisors (see below), whose sum is σ = 7609344. Its totient is φ = 7133700.

The previous prime is 7371509. The next prime is 7371571. The reversal of 7371521 is 1251737.

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: 1251737 = 251 ⋅4987.

It is a cyclic number.

It is not a de Polignac number, because 7371521 - 2⁶ = 7371457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7371571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118865 + ... + 118926.

It is an arithmetic number, because the mean of its divisors is an integer number (1902336).

Almost surely, 2^7371521 is an apocalyptic number.

It is an amenable number.

7371521 is a deficient number, since it is larger than the sum of its proper divisors (237823).

7371521 is a wasteful number, since it uses less digits than its factorization.

7371521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237822.

The product of its digits is 1470, while the sum is 26.

The square root of 7371521 is about 2715.0545114233. The cubic root of 7371521 is about 194.6192086699.

The spelling of 7371521 in words is "seven million, three hundred seventy-one thousand, five hundred twenty-one".