164741261 has 2 divisors, whose sum is σ = 164741262. Its totient is φ = 164741260.

The previous prime is 164741209. The next prime is 164741273. The reversal of 164741261 is 162147461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150528361 + 14212900 = 12269^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 164741261 - 2⁶ = 164741197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164741281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82370630 + 82370631.

It is an arithmetic number, because the mean of its divisors is an integer number (82370631).

Almost surely, 2^164741261 is an apocalyptic number.

It is an amenable number.

164741261 is a deficient number, since it is larger than the sum of its proper divisors (1).

164741261 is an equidigital number, since it uses as much as digits as its factorization.

164741261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 164741261 is about 12835.1572253713. The cubic root of 164741261 is about 548.1938116478.

The spelling of 164741261 in words is "one hundred sixty-four million, seven hundred forty-one thousand, two hundred sixty-one".