7460821 has 4 divisors (see below), whose sum is σ = 7480012. Its totient is φ = 7441632.

The previous prime is 7460813. The next prime is 7460833. The reversal of 7460821 is 1280647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1280647 = 809 ⋅1583.

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 2235025 = 2286^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 7460821 - 2³ = 7460813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7460821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7460851) 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, 9000 + ... + 9793.

It is an arithmetic number, because the mean of its divisors is an integer number (1870003).

Almost surely, 2^7460821 is an apocalyptic number.

It is an amenable number.

7460821 is a deficient number, since it is larger than the sum of its proper divisors (19191).

7460821 is a wasteful number, since it uses less digits than its factorization.

7460821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19190.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 7460821 is about 2731.4503473430. The cubic root of 7460821 is about 195.4019410427.

It can be divided in two parts, 7460 and 821, that added together give a square (8281 = 91²).

The spelling of 7460821 in words is "seven million, four hundred sixty thousand, eight hundred twenty-one".