266042453 has 2 divisors, whose sum is σ = 266042454. Its totient is φ = 266042452.

The previous prime is 266042443. The next prime is 266042479. The reversal of 266042453 is 354240662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251127409 + 14915044 = 15847^2 + 3862^2 .

It is a cyclic number.

It is not a de Polignac number, because 266042453 - 2⁴ = 266042437 is a prime.

It is a Sophie Germain 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 (266042423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133021226 + 133021227.

It is an arithmetic number, because the mean of its divisors is an integer number (133021227).

Almost surely, 2^266042453 is an apocalyptic number.

It is an amenable number.

266042453 is a deficient number, since it is larger than the sum of its proper divisors (1).

266042453 is an equidigital number, since it uses as much as digits as its factorization.

266042453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 266042453 is about 16310.8078585949. The cubic root of 266042453 is about 643.1569709652.

The spelling of 266042453 in words is "two hundred sixty-six million, forty-two thousand, four hundred fifty-three".