1203612161 has 2 divisors, whose sum is σ = 1203612162. Its totient is φ = 1203612160.

The previous prime is 1203612127. The next prime is 1203612173. The reversal of 1203612161 is 1612163021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199929600 + 3682561 = 34640^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203612161 - 2¹⁴ = 1203595777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1203612961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601806080 + 601806081.

It is an arithmetic number, because the mean of its divisors is an integer number (601806081).

Almost surely, 2^1203612161 is an apocalyptic number.

It is an amenable number.

1203612161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203612161 is an equidigital number, since it uses as much as digits as its factorization.

1203612161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1203612161 is about 34693.1140285792. The cubic root of 1203612161 is about 1063.7237494069.

Adding to 1203612161 its reverse (1612163021), we get a palindrome (2815775182).

The spelling of 1203612161 in words is "one billion, two hundred three million, six hundred twelve thousand, one hundred sixty-one".