1971241 has 2 divisors, whose sum is σ = 1971242. Its totient is φ = 1971240.

The previous prime is 1971209. The next prime is 1971251. The reversal of 1971241 is 1421791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1971216 + 25 = 1404^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 1971241 - 2⁵ = 1971209 is a prime.

1971241 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1971251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985620 + 985621.

It is an arithmetic number, because the mean of its divisors is an integer number (985621).

2^1971241 is an apocalyptic number.

It is an amenable number.

1971241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1971241 is an equidigital number, since it uses as much as digits as its factorization.

1971241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 1971241 is about 1404.0089031057. The cubic root of 1971241 is about 125.3852858848.

Subtracting from 1971241 its sum of digits (25), we obtain a square (1971216 = 1404²).

The spelling of 1971241 in words is "one million, nine hundred seventy-one thousand, two hundred forty-one".