121403 has 2 divisors, whose sum is σ = 121404. Its totient is φ = 121402.

The previous prime is 121379. The next prime is 121421. The reversal of 121403 is 304121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121403 - 2¹² = 117307 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121403.

It is not a weakly prime, because it can be changed into another prime (121453) 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, 60701 + 60702.

It is an arithmetic number, because the mean of its divisors is an integer number (60702).

2¹²¹⁴⁰³ is an apocalyptic number.

121403 is a deficient number, since it is larger than the sum of its proper divisors (1).

121403 is an equidigital number, since it uses as much as digits as its factorization.

121403 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 121403 is about 348.4293328639. The cubic root of 121403 is about 49.5157246916.

Adding to 121403 its reverse (304121), we get a palindrome (425524).

It can be divided in two parts, 12 and 1403, that multiplied together give a triangular number (16836 = T₁₈₃).

The spelling of 121403 in words is "one hundred twenty-one thousand, four hundred three", and thus it is an iban number.