261264053 has 2 divisors, whose sum is σ = 261264054. Its totient is φ = 261264052.

The previous prime is 261264049. The next prime is 261264077. The reversal of 261264053 is 350462162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234151204 + 27112849 = 15302^2 + 5207^2 .

It is a cyclic number.

It is not a de Polignac number, because 261264053 - 2² = 261264049 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261261053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130632026 + 130632027.

It is an arithmetic number, because the mean of its divisors is an integer number (130632027).

Almost surely, 2^261264053 is an apocalyptic number.

It is an amenable number.

261264053 is a deficient number, since it is larger than the sum of its proper divisors (1).

261264053 is an equidigital number, since it uses as much as digits as its factorization.

261264053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 261264053 is about 16163.6645906799. The cubic root of 261264053 is about 639.2830945458.

The spelling of 261264053 in words is "two hundred sixty-one million, two hundred sixty-four thousand, fifty-three".