10756021 has 4 divisors (see below), whose sum is σ = 10765612. Its totient is φ = 10746432.

The previous prime is 10756001. The next prime is 10756027. The reversal of 10756021 is 12065701.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12065701 = 3203 ⋅3767.

It can be written as a sum of positive squares in 2 ways, for example, as 7623121 + 3132900 = 2761^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 10756021 - 2⁵ = 10755989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10755983 and 10756001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10756027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2850 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (2691403).

Almost surely, 2^10756021 is an apocalyptic number.

It is an amenable number.

10756021 is a deficient number, since it is larger than the sum of its proper divisors (9591).

10756021 is an equidigital number, since it uses as much as digits as its factorization.

10756021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9590.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 10756021 is about 3279.6373275105. The cubic root of 10756021 is about 220.7414446548.

The spelling of 10756021 in words is "ten million, seven hundred fifty-six thousand, twenty-one".