10642381 has 2 divisors, whose sum is σ = 10642382. Its totient is φ = 10642380.

The previous prime is 10642369. The next prime is 10642397. The reversal of 10642381 is 18324601.

10642381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7070281 + 3572100 = 2659^2 + 1890^2 .

It is an emirp because it is prime and its reverse (18324601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10642381 - 2⁷ = 10642253 is a prime.

It is a super-2 number, since 2×10642381² = 226520546698322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10642301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5321190 + 5321191.

It is an arithmetic number, because the mean of its divisors is an integer number (5321191).

Almost surely, 2^10642381 is an apocalyptic number.

It is an amenable number.

10642381 is a deficient number, since it is larger than the sum of its proper divisors (1).

10642381 is an equidigital number, since it uses as much as digits as its factorization.

10642381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 10642381 is about 3262.2662368360. The cubic root of 10642381 is about 219.9612948438.

Adding to 10642381 its reverse (18324601), we get a palindrome (28966982).

The spelling of 10642381 in words is "ten million, six hundred forty-two thousand, three hundred eighty-one".