7410721 has 4 divisors (see below), whose sum is σ = 7423812. Its totient is φ = 7397632.

The previous prime is 7410719. The next prime is 7410727. The reversal of 7410721 is 1270147.

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 4260096 + 3150625 = 2064^2 + 1775^2 .

It is a cyclic number.

It is not a de Polignac number, because 7410721 - 2¹ = 7410719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

7410721 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7410692 and 7410701.

It is not an unprimeable number, because it can be changed into a prime (7410727) 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, 5656 + ... + 6841.

It is an arithmetic number, because the mean of its divisors is an integer number (1855953).

Almost surely, 2^7410721 is an apocalyptic number.

It is an amenable number.

7410721 is a deficient number, since it is larger than the sum of its proper divisors (13091).

7410721 is a wasteful number, since it uses less digits than its factorization.

7410721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13090.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 7410721 is about 2722.2639475260. The cubic root of 7410721 is about 194.9635785583.

Adding to 7410721 its reverse (1270147), we get a palindrome (8680868).

The spelling of 7410721 in words is "seven million, four hundred ten thousand, seven hundred twenty-one".