7152121 has 8 divisors (see below), whose sum is σ = 7597800. Its totient is φ = 6709248.

The previous prime is 7152097. The next prime is 7152139. The reversal of 7152121 is 1212517.

It can be written as a sum of positive squares in 4 ways, for example, as 705600 + 6446521 = 840^2 + 2539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7152121 - 2⁹ = 7151609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7152161) 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 7 ways as a sum of consecutive naturals, for example, 7165 + ... + 8101.

It is an arithmetic number, because the mean of its divisors is an integer number (949725).

Almost surely, 2^7152121 is an apocalyptic number.

It is an amenable number.

7152121 is a deficient number, since it is larger than the sum of its proper divisors (445679).

7152121 is a wasteful number, since it uses less digits than its factorization.

7152121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403.

The product of its digits is 140, while the sum is 19.

The square root of 7152121 is about 2674.3449665292. The cubic root of 7152121 is about 192.6688999447.

Adding to 7152121 its reverse (1212517), we get a palindrome (8364638).

The spelling of 7152121 in words is "seven million, one hundred fifty-two thousand, one hundred twenty-one".