10720521 has 12 divisors (see below), whose sum is σ = 17697472. Its totient is φ = 6125976.

The previous prime is 10720519. The next prime is 10720531. The reversal of 10720521 is 12502701.

10720521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10720521 - 2¹ = 10720519 is a prime.

It is a super-2 number, since 2×10720521² = 229859141022882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10720494 and 10720503.

It is not an unprimeable number, because it can be changed into a prime (10720511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85021 + ... + 85146.

Almost surely, 2^10720521 is an apocalyptic number.

It is an amenable number.

10720521 is a deficient number, since it is larger than the sum of its proper divisors (6976951).

10720521 is a wasteful number, since it uses less digits than its factorization.

10720521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170180 (or 170177 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 10720521 is about 3274.2206706329. The cubic root of 10720521 is about 220.4983263019.

The spelling of 10720521 in words is "ten million, seven hundred twenty thousand, five hundred twenty-one".