10378021 has 2 divisors, whose sum is σ = 10378022. Its totient is φ = 10378020.

The previous prime is 10377967. The next prime is 10378031. The reversal of 10378021 is 12087301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9548100 + 829921 = 3090^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 10378021 - 2⁹ = 10377509 is a prime.

It is equal to p₆₈₈₀₀₀ and since 10378021 and 688000 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 10377983 and 10378001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10378031) 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 as a sum of consecutive naturals, namely, 5189010 + 5189011.

It is an arithmetic number, because the mean of its divisors is an integer number (5189011).

Almost surely, 2^10378021 is an apocalyptic number.

It is an amenable number.

10378021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10378021 is an equidigital number, since it uses as much as digits as its factorization.

10378021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 10378021 is about 3221.4935976966. The cubic root of 10378021 is about 218.1247006999.

The spelling of 10378021 in words is "ten million, three hundred seventy-eight thousand, twenty-one".