10142381 has 2 divisors, whose sum is σ = 10142382. Its totient is φ = 10142380.

The previous prime is 10142369. The next prime is 10142383. The reversal of 10142381 is 18324101.

10142381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 188356 = 3155^2 + 434^2 .

It is an emirp because it is prime and its reverse (18324101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10142381 - 2⁶ = 10142317 is a prime.

It is a super-2 number, since 2×10142381² = 205735784698322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 10142383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10142383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5071190 + 5071191.

It is an arithmetic number, because the mean of its divisors is an integer number (5071191).

Almost surely, 2^10142381 is an apocalyptic number.

It is an amenable number.

10142381 is a deficient number, since it is larger than the sum of its proper divisors (1).

10142381 is an equidigital number, since it uses as much as digits as its factorization.

10142381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 10142381 is about 3184.7105048968. The cubic root of 10142381 is about 216.4611560860.

Adding to 10142381 its reverse (18324101), we get a palindrome (28466482).

The spelling of 10142381 in words is "ten million, one hundred forty-two thousand, three hundred eighty-one".