3661271 has 2 divisors, whose sum is σ = 3661272. Its totient is φ = 3661270.

The previous prime is 3661249. The next prime is 3661277. The reversal of 3661271 is 1721663.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3661271 - 2¹⁸ = 3399127 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3661271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830635 + 1830636.

It is an arithmetic number, because the mean of its divisors is an integer number (1830636).

Almost surely, 2^3661271 is an apocalyptic number.

3661271 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661271 is an equidigital number, since it uses as much as digits as its factorization.

3661271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 3661271 is about 1913.4447993083. Note that the first 3 decimals coincide. The cubic root of 3661271 is about 154.1264913413.

The spelling of 3661271 in words is "three million, six hundred sixty-one thousand, two hundred seventy-one".