7284021 has 8 divisors (see below), whose sum is σ = 9812544. Its totient is φ = 4805760.

The previous prime is 7283999. The next prime is 7284023. The reversal of 7284021 is 1204827.

7284021 = 89² + 90² + ... + 282².

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

It is not a de Polignac number, because 7284021 - 2⁵ = 7283989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7283982 and 7284000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7284023) 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, 12225 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (1226568).

Almost surely, 2^7284021 is an apocalyptic number.

It is an amenable number.

7284021 is a deficient number, since it is larger than the sum of its proper divisors (2528523).

7284021 is a wasteful number, since it uses less digits than its factorization.

7284021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25131.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 7284021 is about 2698.8925506585. The cubic root of 7284021 is about 193.8460978715.

Adding to 7284021 its reverse (1204827), we get a palindrome (8488848).

The spelling of 7284021 in words is "seven million, two hundred eighty-four thousand, twenty-one".