120312403 has 2 divisors, whose sum is σ = 120312404. Its totient is φ = 120312402.

The previous prime is 120312359. The next prime is 120312443. The reversal of 120312403 is 304213021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120312403 - 2¹⁷ = 120181331 is a prime.

It is not a weakly prime, because it can be changed into another prime (120312443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60156201 + 60156202.

It is an arithmetic number, because the mean of its divisors is an integer number (60156202).

Almost surely, 2^120312403 is an apocalyptic number.

120312403 is a deficient number, since it is larger than the sum of its proper divisors (1).

120312403 is an equidigital number, since it uses as much as digits as its factorization.

120312403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 120312403 is about 10968.7010625689. The cubic root of 120312403 is about 493.6700728819.

Adding to 120312403 its reverse (304213021), we get a palindrome (424525424).

The spelling of 120312403 in words is "one hundred twenty million, three hundred twelve thousand, four hundred three".