10720557 has 24 divisors (see below), whose sum is σ = 16805880. Its totient is φ = 6558720.

The previous prime is 10720531. The next prime is 10720573. The reversal of 10720557 is 75502701.

10720557 is a `hidden beast` number, since 107 + 2 + 0 + 557 = 666.

10720557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 86436 + 10634121 = 294^2 + 3261^2 .

It is not a de Polignac number, because 10720557 - 2⁷ = 10720429 is a prime.

It is a super-2 number, since 2×10720557² = 229860684780498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10720557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10720357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5419 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (700245).

Almost surely, 2^10720557 is an apocalyptic number.

10720557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

10720557 is a deficient number, since it is larger than the sum of its proper divisors (6085323).

10720557 is a wasteful number, since it uses less digits than its factorization.

10720557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 10720557 is about 3274.2261681197. The cubic root of 10720557 is about 220.4985731162.

The spelling of 10720557 in words is "ten million, seven hundred twenty thousand, five hundred fifty-seven".