10420381 has 2 divisors, whose sum is σ = 10420382. Its totient is φ = 10420380.

The previous prime is 10420363. The next prime is 10420393. The reversal of 10420381 is 18302401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10304100 + 116281 = 3210^2 + 341^2 .

It is a cyclic number.

It is not a de Polignac number, because 10420381 - 2⁵ = 10420349 is a prime.

It is a super-2 number, since 2×10420381² = 217168680370322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10420321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210190 + 5210191.

It is an arithmetic number, because the mean of its divisors is an integer number (5210191).

Almost surely, 2^10420381 is an apocalyptic number.

It is an amenable number.

10420381 is a deficient number, since it is larger than the sum of its proper divisors (1).

10420381 is an equidigital number, since it uses as much as digits as its factorization.

10420381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 10420381 is about 3228.0614925989. The cubic root of 10420381 is about 218.4210712517.

Adding to 10420381 its reverse (18302401), we get a palindrome (28722782).

It can be divided in two parts, 10420 and 381, that added together give a palindrome (10801).

The spelling of 10420381 in words is "ten million, four hundred twenty thousand, three hundred eighty-one".