7254521 has 4 divisors (see below), whose sum is σ = 7353972. Its totient is φ = 7155072.

The previous prime is 7254517. The next prime is 7254539. The reversal of 7254521 is 1254527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1590121 + 5664400 = 1261^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 7254521 - 2² = 7254517 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7254551) 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, 49616 + ... + 49761.

It is an arithmetic number, because the mean of its divisors is an integer number (1838493).

Almost surely, 2^7254521 is an apocalyptic number.

It is an amenable number.

7254521 is a deficient number, since it is larger than the sum of its proper divisors (99451).

7254521 is an equidigital number, since it uses as much as digits as its factorization.

7254521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99450.

The product of its digits is 2800, while the sum is 26.

The square root of 7254521 is about 2693.4218013523. The cubic root of 7254521 is about 193.5840540933.

The spelling of 7254521 in words is "seven million, two hundred fifty-four thousand, five hundred twenty-one".