1771261 has 2 divisors, whose sum is σ = 1771262. Its totient is φ = 1771260.

The previous prime is 1771223. The next prime is 1771271. The reversal of 1771261 is 1621771.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988036 + 783225 = 994^2 + 885^2 .

It is an emirp because it is prime and its reverse (1621771) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1771261 - 2¹⁵ = 1738493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1771201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 885630 + 885631.

It is an arithmetic number, because the mean of its divisors is an integer number (885631).

2^1771261 is an apocalyptic number.

It is an amenable number.

1771261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1771261 is an equidigital number, since it uses as much as digits as its factorization.

1771261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588, while the sum is 25.

The square root of 1771261 is about 1330.8872980084. The cubic root of 1771261 is about 120.9931694799.

The spelling of 1771261 in words is "one million, seven hundred seventy-one thousand, two hundred sixty-one".