7106721 has 4 divisors (see below), whose sum is σ = 9475632. Its totient is φ = 4737812.

The previous prime is 7106707. The next prime is 7106753. The reversal of 7106721 is 1276017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7106721 - 2¹⁰ = 7105697 is a prime.

7106721 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7106691 and 7106700.

It is not an unprimeable number, because it can be changed into a prime (7106621) 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, 1184451 + ... + 1184456.

It is an arithmetic number, because the mean of its divisors is an integer number (2368908).

Almost surely, 2^7106721 is an apocalyptic number.

It is an amenable number.

7106721 is a deficient number, since it is larger than the sum of its proper divisors (2368911).

7106721 is a wasteful number, since it uses less digits than its factorization.

7106721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368910.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 7106721 is about 2665.8433937499. The cubic root of 7106721 is about 192.2603618372.

The spelling of 7106721 in words is "seven million, one hundred six thousand, seven hundred twenty-one".