7530021 has 12 divisors (see below), whose sum is σ = 10983648. Its totient is φ = 4970664.

The previous prime is 7530007. The next prime is 7530059. The reversal of 7530021 is 1200357.

It is not a de Polignac number, because 7530021 - 2¹⁴ = 7513637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7529976 and 7530003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7530071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3135 + ... + 4988.

It is an arithmetic number, because the mean of its divisors is an integer number (915304).

Almost surely, 2^7530021 is an apocalyptic number.

It is an amenable number.

7530021 is a deficient number, since it is larger than the sum of its proper divisors (3453627).

7530021 is a wasteful number, since it uses less digits than its factorization.

7530021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8232 (or 8229 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 7530021 is about 2744.0883732125. The cubic root of 7530021 is about 196.0042082256.

Adding to 7530021 its reverse (1200357), we get a palindrome (8730378).

The spelling of 7530021 in words is "seven million, five hundred thirty thousand, twenty-one".