10620781 has 2 divisors, whose sum is σ = 10620782. Its totient is φ = 10620780.

The previous prime is 10620769. The next prime is 10620793. The reversal of 10620781 is 18702601.

10620781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (10620769) and next prime (10620793).

It can be written as a sum of positive squares in only one way, i.e., 5929225 + 4691556 = 2435^2 + 2166^2 .

It is a cyclic number.

It is not a de Polignac number, because 10620781 - 2⁷ = 10620653 is a prime.

It is a super-2 number, since 2×10620781² = 225601978099922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10620721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310390 + 5310391.

It is an arithmetic number, because the mean of its divisors is an integer number (5310391).

Almost surely, 2^10620781 is an apocalyptic number.

It is an amenable number.

10620781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10620781 is an equidigital number, since it uses as much as digits as its factorization.

10620781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 10620781 is about 3258.9539732865. The cubic root of 10620781 is about 219.8123813644.

The spelling of 10620781 in words is "ten million, six hundred twenty thousand, seven hundred eighty-one".