7604221 has 4 divisors (see below), whose sum is σ = 7613244. Its totient is φ = 7595200.

The previous prime is 7604213. The next prime is 7604231. The reversal of 7604221 is 1224067.

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 3648100 + 3956121 = 1910^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 7604221 - 2³ = 7604213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7604192 and 7604201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7604231) 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, 3100 + ... + 4981.

It is an arithmetic number, because the mean of its divisors is an integer number (1903311).

Almost surely, 2^7604221 is an apocalyptic number.

It is an amenable number.

7604221 is a deficient number, since it is larger than the sum of its proper divisors (9023).

7604221 is an equidigital number, since it uses as much as digits as its factorization.

7604221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9022.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 7604221 is about 2757.5752029636. The cubic root of 7604221 is about 196.6459063917.

Adding to 7604221 its reverse (1224067), we get a palindrome (8828288).

The spelling of 7604221 in words is "seven million, six hundred four thousand, two hundred twenty-one".