1791161 has 2 divisors, whose sum is σ = 1791162. Its totient is φ = 1791160.

The previous prime is 1791121. The next prime is 1791169. The reversal of 1791161 is 1611971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1771561 + 19600 = 1331^2 + 140^2 .

It is an emirp because it is prime and its reverse (1611971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1791161 - 2¹⁰ = 1790137 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1791161.

It is not a weakly prime, because it can be changed into another prime (1791169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895580 + 895581.

It is an arithmetic number, because the mean of its divisors is an integer number (895581).

2^1791161 is an apocalyptic number.

It is an amenable number.

1791161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791161 is an equidigital number, since it uses as much as digits as its factorization.

1791161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 26.

The square root of 1791161 is about 1338.3426317651. The cubic root of 1791161 is about 121.4445998285. Note that the first 3 decimals are identical.

The spelling of 1791161 in words is "one million, seven hundred ninety-one thousand, one hundred sixty-one".