7527121 has 4 divisors (see below), whose sum is σ = 8602432. Its totient is φ = 6451812.

The previous prime is 7527109. The next prime is 7527127. The reversal of 7527121 is 1217257.

It is a happy number.

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: 1217257 = 313 ⋅3889.

It is a cyclic number.

It is not a de Polignac number, because 7527121 - 2⁵ = 7527089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7527127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537645 + ... + 537658.

It is an arithmetic number, because the mean of its divisors is an integer number (2150608).

Almost surely, 2^7527121 is an apocalyptic number.

It is an amenable number.

7527121 is a deficient number, since it is larger than the sum of its proper divisors (1075311).

7527121 is a wasteful number, since it uses less digits than its factorization.

7527121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075310.

The product of its digits is 980, while the sum is 25.

The square root of 7527121 is about 2743.5599136888. The cubic root of 7527121 is about 195.9790429488.

The spelling of 7527121 in words is "seven million, five hundred twenty-seven thousand, one hundred twenty-one".