7245121 has 8 divisors (see below), whose sum is σ = 7875560. Its totient is φ = 6625152.

The previous prime is 7245071. The next prime is 7245127. The reversal of 7245121 is 1215427.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14400 + 7230721 = 120^2 + 2689^2 .

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 7245121 - 2¹⁵ = 7212353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7245092 and 7245101.

It is not an unprimeable number, because it can be changed into a prime (7245127) 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 7 ways as a sum of consecutive naturals, for example, 1140 + ... + 3973.

It is an arithmetic number, because the mean of its divisors is an integer number (984445).

Almost surely, 2^7245121 is an apocalyptic number.

It is an amenable number.

7245121 is a deficient number, since it is larger than the sum of its proper divisors (630439).

7245121 is a wasteful number, since it uses less digits than its factorization.

7245121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5235.

The product of its digits is 560, while the sum is 22.

The square root of 7245121 is about 2691.6762435330. The cubic root of 7245121 is about 193.5004061802.

The spelling of 7245121 in words is "seven million, two hundred forty-five thousand, one hundred twenty-one".