10616721 has 16 divisors (see below), whose sum is σ = 15163200. Its totient is φ = 6583808.

The previous prime is 10616717. The next prime is 10616741. The reversal of 10616721 is 12761601.

It is a cyclic number.

It is not a de Polignac number, because 10616721 - 2² = 10616717 is a prime.

It is a super-2 number, since 2×10616721² = 225429529583682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10616691 and 10616700.

It is not an unprimeable number, because it can be changed into a prime (10616741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3370 + ... + 5708.

It is an arithmetic number, because the mean of its divisors is an integer number (947700).

Almost surely, 2^10616721 is an apocalyptic number.

It is an amenable number.

10616721 is a deficient number, since it is larger than the sum of its proper divisors (4546479).

10616721 is a wasteful number, since it uses less digits than its factorization.

10616721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 10616721 is about 3258.3310144919. The cubic root of 10616721 is about 219.7843686093.

The spelling of 10616721 in words is "ten million, six hundred sixteen thousand, seven hundred twenty-one".