1203161 has 2 divisors, whose sum is σ = 1203162. Its totient is φ = 1203160.

The previous prime is 1203151. The next prime is 1203179. The reversal of 1203161 is 1613021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 866761 + 336400 = 931^2 + 580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1203101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601580 + 601581.

It is an arithmetic number, because the mean of its divisors is an integer number (601581).

2^1203161 is an apocalyptic number.

It is an amenable number.

1203161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203161 is an equidigital number, since it uses as much as digits as its factorization.

1203161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1203161 is about 1096.8869586243. The cubic root of 1203161 is about 106.3590824350.

Adding to 1203161 its reverse (1613021), we get a palindrome (2816182).

The spelling of 1203161 in words is "one million, two hundred three thousand, one hundred sixty-one".