1203121 has 2 divisors, whose sum is σ = 1203122. Its totient is φ = 1203120.

The previous prime is 1203101. The next prime is 1203127. The reversal of 1203121 is 1213021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 4096 = 1095^2 + 64^2 .

It is an emirp because it is prime and its reverse (1213021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203121 - 2⁹ = 1202609 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1203098 and 1203107.

It is not a weakly prime, because it can be changed into another prime (1203127) 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, 601560 + 601561.

It is an arithmetic number, because the mean of its divisors is an integer number (601561).

2^1203121 is an apocalyptic number.

It is an amenable number.

1203121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203121 is an equidigital number, since it uses as much as digits as its factorization.

1203121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1203121 is about 1096.8687250533. The cubic root of 1203121 is about 106.3579037591.

Adding to 1203121 its reverse (1213021), we get a palindrome (2416142).

The spelling of 1203121 in words is "one million, two hundred three thousand, one hundred twenty-one".