7284921 has 16 divisors (see below), whose sum is σ = 11372928. Its totient is φ = 4060800.

The previous prime is 7284899. The next prime is 7284941. The reversal of 7284921 is 1294827.

It is a happy number.

It is not a de Polignac number, because 7284921 - 2¹⁷ = 7153849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7284941) 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 15 ways as a sum of consecutive naturals, for example, 3370 + ... + 5091.

It is an arithmetic number, because the mean of its divisors is an integer number (710808).

Almost surely, 2^7284921 is an apocalyptic number.

It is an amenable number.

7284921 is a deficient number, since it is larger than the sum of its proper divisors (4088007).

7284921 is a wasteful number, since it uses less digits than its factorization.

7284921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8512.

The product of its digits is 8064, while the sum is 33.

The square root of 7284921 is about 2699.0592805642. The cubic root of 7284921 is about 193.8540812963.

The spelling of 7284921 in words is "seven million, two hundred eighty-four thousand, nine hundred twenty-one".