261054253 has 2 divisors, whose sum is σ = 261054254. Its totient is φ = 261054252.

The previous prime is 261054251. The next prime is 261054289. The reversal of 261054253 is 352450162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198612649 + 62441604 = 14093^2 + 7902^2 .

It is a cyclic number.

It is not a de Polignac number, because 261054253 - 2¹ = 261054251 is a prime.

Together with 261054251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261054251) 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, 130527126 + 130527127.

It is an arithmetic number, because the mean of its divisors is an integer number (130527127).

Almost surely, 2^261054253 is an apocalyptic number.

It is an amenable number.

261054253 is a deficient number, since it is larger than the sum of its proper divisors (1).

261054253 is an equidigital number, since it uses as much as digits as its factorization.

261054253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 261054253 is about 16157.1734223533. The cubic root of 261054253 is about 639.1119298965. Note that the first 3 decimals are identical.

The spelling of 261054253 in words is "two hundred sixty-one million, fifty-four thousand, two hundred fifty-three".