400012103 has 2 divisors, whose sum is σ = 400012104. Its totient is φ = 400012102.

The previous prime is 400012087. The next prime is 400012163. The reversal of 400012103 is 301210004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400012103 - 2⁴ = 400012087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400012163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200006051 + 200006052.

It is an arithmetic number, because the mean of its divisors is an integer number (200006052).

Almost surely, 2^400012103 is an apocalyptic number.

400012103 is a deficient number, since it is larger than the sum of its proper divisors (1).

400012103 is an equidigital number, since it uses as much as digits as its factorization.

400012103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 400012103 is about 20000.3025727112. The cubic root of 400012103 is about 736.8137309587.

Adding to 400012103 its reverse (301210004), we get a palindrome (701222107).

The spelling of 400012103 in words is "four hundred million, twelve thousand, one hundred three".